FprCEN/TS 17702-1

Plant biostimulants - Sampling and sample preparation - Part 1: Sampling

This document specifies sampling plans and methods of representative sampling of plant biostimulants to obtain samples for physical, chemical and biological analysis.
It is applicable to the sampling of lots of plant biostimulants supplied or ready for supply to third parties, as such, or in smaller lots.
It is also applicable to the sampling of blends of fertilizing products where plant biostimulants are main part of the blend. Otherwise, deliverables of sampling relevant for the main part of the blend apply.
This document is intended to be used by manufacturers, buyers and competent authorities to obtain samples prior to transport and supply it to a laboratory for testing.
NOTE   This document is applicable to the category of EU fertilizing product (plant biostimulants) in the meaning of the Regulation (EU) 2019/1009.

Biostimulanzien für die pflanzliche Anwendung - Probenahme und Probenvorbereitung - Teil 1: Probenahme

Dieses Dokument legt Probenahmepläne und Verfahren der repräsentativen Probenahme aus Biostimulanzien für die pflanzliche Anwendung zur Gewinnung von Proben für physikalische, chemische und biologische Analysen fest.
Es ist auf die Probenahme aus Losen von Biostimulanzien für die pflanzliche Anwendung, die als solche oder in kleineren Losen an Dritte geliefert wurden oder lieferbereit sind, anwendbar.
Es ist zudem auf die Probenahme aus Mischungen von Düngeprodukten anwendbar, bei denen Biostimulanzien für die pflanzliche Anwendung den Hauptbestandteil der Mischung darstellen. Andernfalls gelten die für den Hauptbestandteil der Mischung relevanten Vorgaben für die Probenahme.
Dieses Dokument ist für die Verwendung durch Hersteller, Käufer und die zuständigen Behörden bestimmt, um Proben vor dem Transport zu erhalten und diese zur Untersuchung an ein Labor zu übergeben.
ANMERKUNG   Dieses Dokument ist anwendbar auf die Kategorie von EU Düngeprodukten (Biostimulanzien für die pflanzliche Anwendung) im Sinne der Verordnung (EU) 2019/1009.

Biostimulants des végétaux - Échantillonnage et préparation des échantillons - Partie 1 : Échantillonnage

Le présent document spécifie les plans d'échantillonnage et les méthodes d'échantillonnage représentatif de biostimulants des végétaux pour obtenir des échantillons en vue d’une analyse physique, chimique et biologique.
Il est applicable à l’échantillonnage de lots de biostimulants des végétaux livrés ou prêts à être livrés à une tierce partie, en l’état ou sous forme de lots plus petits.
Il est également applicable à l’échantillonnage de mélanges de fertilisants dans lesquels les biostimulants des végétaux représentent la majorité du mélange. Dans le cas contraire, ce sont les livrables de l’échantillonnage pertinents pour le fertilisant majoritairement présent dans le mélange qui s’appliquent.
Le présent document est destiné à être utilisé par les fabricants, acheteurs et autorités compétentes pour obtenir des échantillons avant de les transporter et de les fournir à un laboratoire pour essai.
NOTE   Le présent document est applicable à la catégorie de fertilisants UE (biostimulants des végétaux) au sens du règlement (UE) 2019/1009.

Rastlinski biostimulansi - Vzorčenje in priprava vzorcev - 1. del: Vzorčenje

General Information

• Status: Not Published
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 455 - Plant Biostimulants and Agricultural Micro-Organisms
• Drafting Committee: CEN/TC 455/WG 1 - Sampling
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Due Date: 02-Dec-2021
• Completion Date: 02-Dec-2021
• Directive: 2019/1009 - Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003
• Mandate: M/564 - Fertilising products in support of Regulation (EU) 2019/1009
• Ref Project: kSIST-TS FprCEN/TS 17702-1:2021 - Plant biostimulants - Sampling and sample preparation - Part 1: Sampling

Standards Content (sample)

SLOVENSKI STANDARD
kSIST-TS FprCEN/TS 17702-1:2021
01-december-2021
Rastlinski biostimulansi - Vzorčenje in priprava vzorcev - 1. del: Vzorčenje
Plant biostimulants - Sampling and sample preparation - Part 1: Sampling

Biostimulanzien für die pflanzliche Anwendung - Probenahme und Probenvorbereitung -

Teil 1: Probenahme

Biostimulants des végétaux - Échantillonnage et préparation des échantillons - Partie 1 :

Échantillonnage
Ta slovenski standard je istoveten z: FprCEN/TS 17702-1
ICS:
65.080 Gnojila Fertilizers
kSIST-TS FprCEN/TS 17702-1:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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kSIST-TS FprCEN/TS 17702-1:2021
FINAL DRAFT
TECHNICAL SPECIFICATION
FprCEN/TS 17702-1
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
September 2021
ICS 65.080
English Version
Plant biostimulants - Sampling and sample preparation -
Part 1: Sampling

Biostimulants des végétaux - Échantillonnage et Biostimulanzien für die pflanzliche Anwendung -

préparation des échantillons - Partie 1 : Probenahme und Probenvorbereitung - Teil 1:

Échantillonnage Probenahme

This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee

CEN/TC 455.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a Technical Specification. It is distributed for review and comments. It is subject to change

without notice and shall not be referred to as a Technical Specification.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 17702-1:2021 E

worldwide for CEN national Members.
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Contents Page

European foreword ............................................................................................................................................ 4

Introduction .......................................................................................................................................................... 5

1 Scope .......................................................................................................................................................... 7

2 Normative references .......................................................................................................................... 7

3 Terms and definitions ......................................................................................................................... 7

4 Sampling plans and quantitative data ........................................................................................... 8

4.1 Principle ................................................................................................................................................... 8

4.2 Sampling plans ....................................................................................................................................... 8

4.2.1 Determination of the number of sampling units which form the sampled portion ..... 8

4.2.2 Identification of the sampling units to be sampled .................................................................. 9

4.2.3 Collection of increments ..................................................................................................................... 9

4.3 Quantitative data ................................................................................................................................ 10

4.3.1 Mass of increments ............................................................................................................................. 10

4.3.2 Mass of aggregate/reduced samples ............................................................................................ 10

4.3.3 Mass of final sample ........................................................................................................................... 10

5 Incremental sampling methods ..................................................................................................... 10

5.1 General.................................................................................................................................................... 10

5.2 Solid plant biostimulants in packages – Reduction method using a rotary mechanical

sample divider ..................................................................................................................................... 10

5.2.1 General.................................................................................................................................................... 10

5.2.2 Principle ................................................................................................................................................. 11

5.2.3 Apparatus .............................................................................................................................................. 11

5.2.4 Procedure .............................................................................................................................................. 11

5.2.5 Precautions ........................................................................................................................................... 13

5.3 Solid plant biostimulants in packages – Reduction method using a riffle divider ...... 13

5.3.1 General.................................................................................................................................................... 13

5.3.2 Apparatus .............................................................................................................................................. 13

5.3.3 Procedure .............................................................................................................................................. 13

5.4 Sampling of solid plant biostimulants in packages – using a spear .................................. 14

5.4.1 General.................................................................................................................................................... 14

5.4.2 Apparatus .............................................................................................................................................. 15

5.4.3 Procedure .............................................................................................................................................. 15

5.5 Sampling of solid plant biostimulants in packages – Manual method ............................. 16

5.6 Sampling of fluid plant biostimulants ......................................................................................... 17

6 Reduction of aggregate sample ...................................................................................................... 18

6.1 General.................................................................................................................................................... 18

6.2 Solid plant biostimulants ................................................................................................................. 18

6.2.1 General.................................................................................................................................................... 18

6.2.2 Riffle divider ......................................................................................................................................... 18

6.2.3 Coning and quartering ...................................................................................................................... 18

6.3 Fluid plant biostimulants ................................................................................................................. 19

6.3.1 Apparatus .............................................................................................................................................. 19

6.3.2 Procedure .............................................................................................................................................. 19

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7 Division into final samples .............................................................................................................. 19

8 Practical arrangements for final (laboratory) samples ........................................................ 19

8.1 General ................................................................................................................................................... 19

8.2 Containers ............................................................................................................................................. 19

8.3 Sealing of containers ......................................................................................................................... 19

8.4 Labelling of final samples ................................................................................................................ 20

8.5 Dispatch of the final sample ............................................................................................................ 20

8.6 Storage of final samples ................................................................................................................... 20

9 Sampling report .................................................................................................................................. 20

9.1 General ................................................................................................................................................... 20

9.2 Essential information ........................................................................................................................ 20

9.3 Additional information ..................................................................................................................... 21

Annex A (informative) Examples of rotating sample dividers ........................................................ 22

Annex B (informative) Test for bias in a rotary divider .................................................................... 24

Annex C (informative) Examples of apparatus for sampling of fluid plant biostimulant ...... 25

Annex D (informative) Methods of mixing for fluid plant biostimulants .................................... 27

D.1 General ................................................................................................................................................... 27

D.2 Small containers.................................................................................................................................. 27

D.2.1 Hand shaking ........................................................................................................................................ 27

D.2.2 Rocking ................................................................................................................................................... 27

D.3 Containers bigger than 20 l and up to 1 000 l........................................................................... 27

D.3.1 Rocking in a see-saw fashion .......................................................................................................... 27

D.3.2 Rolling to and fro ................................................................................................................................ 27

D.3.3 Mechanically driven drum shaker or roller .............................................................................. 27

D.3.5 Hand mixing .......................................................................................................................................... 29

D.3.6 Compressed gas ................................................................................................................................... 30

D.4 Precautions for sampling of multi-phase fluids ...................................................................... 30

D.5 Precautions against static electricity .......................................................................................... 31

Bibliography ....................................................................................................................................................... 33

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European foreword

This document (FprCEN/TS 17702-1:2021) has been prepared by Technical Committee CEN/TC 455

“Plant Biostimulants”, the secretariat of which is held by AFNOR.
This document is currently submitted to the Vote on TS.

The CEN/TS 17702 series, Plant biostimulants - Sampling and sample preparation, consists of the

following parts:

— CEN/TS 17702-1, Plant biostimulants - Sampling and sample preparation - Part 1: Sampling;

— CEN/TS 17702-2, Plant biostimulants - Sampling and sample preparation - Part 2: Sample preparation.

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Introduction

This document was prepared by the experts of CEN/TC 455 ‘Plant Biostimulants’. The European

Committee for Standardization (CEN) was requested by the European Commission (EC) to draft

European standards or European standardization deliverables to support the implementation of

Regulation (EU) 2019/1009 of 5 June 2019 laying down rules on the making available on the market of

EU fertilising products (“FPR” or “Fertilising Products Regulation”).

This request, presented as SR M/564, also contributes to the Communication on “Innovating for

Sustainable Growth: A Bio economy for Europe”. The Working Group 1 “Sampling”, was created to

develop a work program as part of this Request. The technical committee CEN/TC 455 ‘Plant

Biostimulants’ was established to carry out the work program that will prepare a series of standards. The

interest in biostimulants has increased significantly in Europe as a valuable tool to use in agriculture.

Standardization was identified as having an important role in order to promote the use of biostimulants.

The work of CEN/TC 455 seeks to improve the reliability of the supply chain, thereby improving the

confidence of farmers, industry, and consumers in biostimulants, and will promote and support

commercialisation of the European biostimulant industry.

This document covers the following aspects of sampling, derived from EN 1482-1:2007, Fertilizers and

liming materials – Sampling and sample preparation – Part 1: Sampling and documents indicated. This

document is presented in a form adapted to the specificity of plant biostimulants. The titles of the

standards are given in the Bibliography.

From a technical point of view, sampling is generally defined as the withdrawal operation, of the part of

a “mass”, of such dimensions that the properties found in the sample taken are, within the limits of

statistical acceptability, the same as those of the mass of origin (representativeness of the sample). In

other words, the ultimate purpose of sampling is to allow the collection of representative portions of

plant biostimulants to be subject to analysis. Therefore, it fundamentally affects the significance and

reliability of the analytical results themselves.

The final results, in fact, must as far as possible refer to the state and conditions in where the material is

found at the time of collection, therefore, care must be taken to avoid or minimize possible modifications

to the chemical, physical and biological properties of the sample during or after sampling.

In conclusion, for a correct sampling, it is necessary that the sampling and collection of samples take place

quickly, if possible, taking necessary precautions to ensure that they are representative of the plant

biostimulants to be analysed and that the samples taken are stored in appropriate way. The surfaces,

containers and instruments used must be clean and dry.

Furthermore, remind the protection of health and safety in places of work that every intervention must

be carried out in compliance with the defined prevention and protection measures (including the use of

any suitable PPE), in particular a careful reading of the labels on the product and where available on the

safety data sheet.

Figure 1 gives a schematic diagram of the sampling and sample preparation process.

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Figure 1 — Schematic diagram of sampling process for solid plant biostimulants
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1 Scope

This document specifies sampling plans and methods of representative sampling of plant biostimulants

to obtain samples for physical, chemical and biological analysis.

It is applicable to the sampling of lots of plant biostimulants supplied or ready for supply to third parties,

as such, or in smaller lots.

It is also applicable to the sampling of blends of fertilizing products where plant biostimulants are main

part of the blend. Otherwise, deliverables of sampling relevant for the main part of the blend apply.

This document is intended to be used by manufacturers, buyers and competent authorities to obtain

samples prior to transport and supply it to a laboratory for testing.

NOTE This document is applicable to the category of EU fertilizing product (plant biostimulants) in the

meaning of the Regulation (EU) 2019/1009.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
aggregate sample
combination of all increments from the lot
3.2
division

process of producing a number of representative smaller portions, approximately equal in mass to each

other, from a larger mass
3.3
final sample

representative part of the reduced sample or, where no intermediate reduction is required, of the

aggregate sample

Note 1 to entry: Often, more than one sample is prepared, at the same time, from the reduced sample (or from the

aggregate sample). One or more of these final samples will be used as a laboratory sample or as laboratory samples,

while others may be stored for reference purposes.
3.4
increment
representative quantity of material taken from a sampling unit
Note 1 to entry: This may be constituted from a number of sub samples.
3.5
laboratory sample
final sample intended for laboratory inspection or testing
3.6
lot

total quantity of material, assumed to have the same characteristics, to be sampled using a sampling plan

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3.7
reduced sample

representative part of the aggregate sample obtained by a process of reduction in such a manner that the

mass is at least the mass of the required final samples
3.8
reduction

process of producing a representative smaller mass of plant biostimulant from a larger mass, with the

remainder being discarded
3.9
sampling unit
defined quantity of material having a boundary (e.g. a container)
3.10
sampled portion

quantity of a material consisting of all the sampling units from which increments are to be taken and

having characteristics presumed to be uniform
4 Sampling plans and quantitative data
4.1 Principle

The sampling plans given in this document are not based on strict statistical principles, but samples

obtained by following the procedures described in this clause shall be considered to be representative of

the original lot or sampled portion.

This clause specifies sampling plans for the evaluation of deliveries of plant biostimulants as well as

statutory control plans which have to be followed in certain circumstances.

According to available resources, the plant biostimulants are not supplied in other than packaged form

(up to 1000 kg / 1 000 l). Therefore this document specifies principles for those cases. Nevertheless, if

plant biostimulants were delivered in larger packages and containers or in bulk, the principles of

EN 1482-1:2007 should be applied accordingly.

For statutory control and the simple commercial evaluation of a small quantity of plant biostimulant, one

final sample is sufficient, but this may subsequently be divided into a number of identical samples.

The number of sampling units from which increments are to be taken depends on the size of the lot.

No incremental samples are taken at microbial plant biostimulants - in order to preserve the sensitive

content and maintain its properties intact avoiding possible contamination. Thus, the original package or

container itself shall be considered a final sample.
4.2 Sampling plans

4.2.1 Determination of the number of sampling units which form the sampled portion

4.2.1.1 General

The number of sampling units from which increments are to be taken depends on the size of the lot.

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4.2.1.2 Plant biostimulant in packages or containers up to 50 kg or 50 l

The sampling unit is a package or container and the number of individual packages (containers) from

which incremental samples are to be taken should be in accordance with Table 1. For packages smaller

than 1 kg (1 l) each, it might be necessary to increase the number taken to ensure a sufficiently large

aggregate sample.
Table 1 — Number of individual packages (containers)
from which incremental samples are to be taken
Lot size Minimum number of sampling units
4 or fewer packages All packages
More than 4 up to 10 packages 4 packages
More than 10 up to 400 The nearest whole number above the square root of
packages the number of packs.
More than 400 packages 20

4.2.1.3 Plant biostimulant in packages or containers of more than 50 kg or 50 l and up to

1 000 kg or 1 000 l

Sampling units are mostly larger containers such as Intermediate Bulk Containers (IBC's). The number of

sampling units from which incremental samples should be taken depends on the total mass present. The

number of sampling units to be sampled should be in accordance with Table 2.

Table 2 — Number of sampling units from which incremental samples are to be taken

Lot size Minimum number of sampling units
25 t (25 m ) or less
The nearest whole number above the square root of
More than 25 t (25 m ) and up
the number of packs.
to 400 t (400 m )
More than 400 t (400 m )
4.2.2 Identification of the sampling units to be sampled

Identify the packages in the lot or sampled portion consecutively and, by using a source of random

numbers, select the packages from which incremental samples are to be taken and mark them.

For microbial plant biostimulants - identify the packages in the lot or sampled portion consecutively and,

by using a source of random numbers, select five packages which are to be taken as final samples.

4.2.3 Collection of increments
4.2.3.1 General
All incremental samples shall be of approximately the same mass/volume.
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4.2.3.2 Solid plant biostimulants

Collect the relevant number of increment from each of the selected packages (sampling units - 4.2.2), by

the use of a divider (5.2 or 5.3), by the use of a spear (5.4) or by the manual method (5.5).

4.2.3.3 Fluid plant biostimulants
Follow the appropriate procedure described in 5.6.
4.3 Quantitative data
4.3.1 Mass of increments

Increments should normally be of at least 250 g (250 ml) each. For packages of 1 kg (1 l) or smaller, the

entire contents are taken as the increment.
4.3.2 Mass of aggregate/reduced samples

Combine and mix all the collected increments. When necessary, reduce the aggregate sample as described

in Clause 5, so that the final mass for chemical or biological testing is at least 2 kg (2 l) and for physical

testing at least 4 times the maximum amount required for the physical test method.

4.3.3 Mass of final sample

The mass of each final sample for chemical or biological analysis shall be at least 500 g. For physical

testing the mass is dependent on the test(s) to be carried out.
5 Incremental sampling methods
5.1 General

Packages of solid plant biostimulants may be sampled by a process of reduction (see 5.2 and 5.3), starting

with the total contents of the package, or by spear sampling (see 5.4.) from the selected packages but the

latter only when the product is uniform. The packages (including IBC's) may be sampled by emptying the

contents as in the method described in 5.5.

Containers up to 20 l of fluid plant biostimulants may be sampled by a process of pouring into collecting

vessel immediately after homogenization. All containers may be sampled by a process of filling of tube,

sucking by sampling pump or by sampling at source.

The sampling apparatus shall be clean, dry and inert (i.e. fabricated of materials that will not affect the

characteristics of the plant biostimulant to be sampled).

All sampling operations should be carried out in such a way as to minimize changes to sample properties,

e.g. moisture content.

5.2 Solid plant biostimulants in packages – Reduction method using a rotary mechanical

sample divider
5.2.1 General

This subclause specifies a method suitable for the reduction of a mass of a solid plant biostimulant to a

smaller quantity which forms the incremental sample from the package.

The method may also be used to prepare reduced samples, final samples or laboratory samples.

By choosing suitable equipment, the method is applicable to the reduction of a sample of any mass above

a minimum defined by the size and number of particles.
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5.2.2 Principle

Passage of the material through a rotary mechanical sample divider. Collection of the fractions followed

by rejection or recombination of some of the fractions to give the desired quantity for the incremental

sample.
5.2.3 Apparatus
5.2.3.1 General

Rotary mechanical sample dividers are of several basic types. They can operate by collecting subsamples

from a falling stream (cutter type) or by extracting a helical ribbon from a falling cylindrical curtain, such

as is created by allowing the plant biostimulant to fall onto the apex of a cone distributor. In the case of

the cutter type, each sub-sample consists of a complete cross-section of the stream.

The sample divider is fed from a hopper fitted with one of a series of interchangeable orifices so that the

criteria below can be met.

A standard divider operates at a rotational frequency of about 60 rounds min but this rotational

frequency can be increased up to about 360 rounds min , the variance of the sample division being

reduced as a larger number of sub-samples are taken. However, care is needed to ensure that there is no

bias because of larger particles bouncing on the rapidly moving edges of the sample receiver or because

particles are shattered.

The hopper can be on the vertical axis of the receiver, feeding via the distributing cone, or off-centre when

no such cone is needed.

Examples of rotary sample dividers are shown in Annex A, Figures A.1, A.2 and A.3.

All sample dividers shall conform to the following basic requirements.

a) The effective opening of the cutter or slot shall be at least three times, but preferably five times, the

maximum particle size of the plant biostimulant to be divided. In practice, this means a minimum

dimension of at least 15 mm.

b) The divider shall be constructed and operated in such a manner that every particle has an equal

opportunity of being included in the sub-sample. Provided that all parts of the stream are sampled in

due proportion, an unbiased sample should be obtained.

c) During reduction, there shall be at least 50 rotations of the cup(s) so that at least 50 increments are

taken from the gross sample at each stage of division.

5.2.3.2 Test for bias (referred to previous clause: Rotary mechanical sample dividers)

A suitable test for bias is given in Annex B.
5.2.4 Procedure
5.2.4.1 General

Follow the procedure specified in 5.2.4.2, or 5.2.4.3 depending on the mass of the bulk sample.

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5.2.4.2 Sample small enough for the apparatus to handle the whole quantity in one pass

5.2.4.2.1 Set the rotary sample divi
...