prEN 14944-1 rev
(Main)Influence of cementitious products on water intended for human consumption - Test methods - Part 1: Influence of migration from factory made cementitious products on the organoleptic parameters
Influence of cementitious products on water intended for human consumption - Test methods - Part 1: Influence of migration from factory made cementitious products on the organoleptic parameters
This European Standard specifies a method to determine the influence of factory made cementitious products on the odour, flavour, colour and turbidity of test waters after contact with the products.
This European Standard is applicable to factory made cementitious products, e.g. cement mortar linings to metallic pipes, tanks, concrete pipes etc. intended to be used for the transport and storage of water for human consumption, including raw water used for the production of drinking water.
Einfluss zementgebundener Produkte auf Wasser für den menschlichen Gebrauch - Prüfverfahren - Teil 1: Einfluss fabrikmäßig hergestellter zementgebundener Produkte auf organoleptische Parameter und Migration von organischen Substanzen (TOC)
Influence des produits à base de ciment sur l'eau destinée à la consommation humaine - Méthodes d'essai - Partie 1 : Influence sur les paramètres organoleptiques et migration de substances organiques à partir des produits fabriqués en usine
La présente Norme européenne spécifie une méthode permettant de déterminer l'influence des produits à base de ciment fabriqués en usine sur l'odeur, la flaveur, la couleur, la turbidité et la teneur en carbone organique total (COT) des eaux d'essai après contact avec les produits concernés.
La présente Norme européenne s'applique aux produits à base de ciment fabriqués en usine, tels que les revêtements intérieurs de mortier de ciment appliqués sur des tubes métalliques, des réservoirs, des tubes en béton, etc., destinés à être utilisés pour le transport et le stockage de l'eau destinée à la consommation humaine, y compris l'eau brute utilisée pour la production de l'eau potable.
Vpliv cementnih proizvodov na pitno vodo - Preskusne metode - 1. del: Vpliv industrijsko izdelanih cementnih proizvodov na organoleptične parametre
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 14944-1:2015
01-junij-2015
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Influence of cementitious products on water intended for human consumption - Test
methods - Part 1: Influence of migration from factory made cementitious products on the
organoleptic parametersEinfluss von zementgebundenen Produkten auf Wasser für den menschlichen Gebrauch
- Prüfverfahren - Teil 1: Einfluss fabrikmäßig hergestellter zementgebundener Produkte
auf organoleptische ParameterInfluence des produits à base de ciment sur l'eau destinée à la consommation humaine -
Méthodes d'essai - Partie 1 : Influence sur les paramètres organoleptiques et migration
de substances organiques à partir des produits fabriqués en usineTa slovenski standard je istoveten z: prEN 14944-1 rev
ICS:
13.060.20 Pitna voda Drinking water
67.250 Materiali in predmeti v stiku z Materials and articles in
živili contact with foodstuffs
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
oSIST prEN 14944-1:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 14944-1:2015
EUROPEAN STANDARD
DRAFT
prEN 14944-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 13.060.20; 67.250 Will supersede EN 14944-1:2006
English Version
Influence of cementitious products on water intended for human
consumption - Test methods - Part 1: Influence of migration from
factory made cementitious products on the organoleptic
parameters
Influence des produits à base de ciment sur l'eau destinée Einfluss von zementgebundenen Produkten auf Wasser für
à la consommation humaine - Méthodes d'essai - Partie 1 : den menschlichen Gebrauch - Prüfverfahren - Teil 1:
Influence sur les paramètres organoleptiques et migration Einfluss fabrikmäßig hergestellter zementgebundener
de substances organiques à partir des produits fabriqués en Produkte auf organoleptische Parameter
usineThis draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 164.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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 European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14944-1:2015 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
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prEN 14944-1:2015 (E)
Contents Page
Foreword ..............................................................................................................................................................3
Introduction .........................................................................................................................................................4
1 Scope ......................................................................................................................................................5
2 Normative references ............................................................................................................................5
3 Terms and definitions ...........................................................................................................................6
4 Principle ..................................................................................................................................................8
5 Reagents .................................................................................................................................................9
6 Apparatus ............................................................................................................................................ 10
7 Samples and test pieces .................................................................................................................... 12
8 Pre-treatment of samples (curing and preconditioning) ................................................................ 14
9 Test procedure .................................................................................................................................... 15
10 Determination of odour as TON and flavour as TFN ....................................................................... 15
11 Determination of colour and turbidity .............................................................................................. 16
12 Determination of TOC and calculation of test results..................................................................... 16
13 Expression of results ......................................................................................................................... 17
14 Test report ........................................................................................................................................... 17
Annex A (normative) Additional procedures for testing factory made pipes (cement mortar lined
and concrete) ...................................................................................................................................... 20
Annex B (normative) Additional procedures for testing factory made fittings (cement mortar
lined and concrete) ............................................................................................................................. 25
Annex C (normative) Additional procedures for testing factory made storage systems (cement
mortar, cement mortar lined and concrete) ..................................................................................... 30
Annex D (informative) Examples of typical test pieces and test conditions as a function of S/V
ratio ...................................................................................................................................................... 35
Annex E (informative) Test arrangements for testing factory made cementitious products ................... 39
Annex F (normative) Additional procedures for testing factory made cementitious products at
elevated temperature .......................................................................................................................... 45
Annex G (informative) Discrimination between porous and non-porous coatings on factory made
products ............................................................................................................................................... 46
Annex H (informative) Schematic description of the test procedure .......................................................... 48
Bibliography ..................................................................................................................................................... 51
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Foreword
This document (prEN 14944-1:2015) has been prepared by Technical Committee CEN/TC 164 "Water supply", the
secretariat of which is held by AFNOR.This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14944-1:2006.
In comparison with EN 14944-1:2006, the following changes have been made:
— provisions for testing the influence of materials on TOC have been added,
— the test method for TON /TFN according to EN 1622 has been specified according to the revised prEN 1420,
— requirements for disinfection (preconditioning with 50 mg/L Chlorine) have been removed,
— a procedure for extending the number of migration periods has been included.This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association.This document describes a test method to determine the influence(s) of factory made cementitious products on
organoleptic parameters and the migration of organic substances (TOC) in water intended for human consumption.
This European Standard will result in one of a series of standards that support appropriate standards.
This European Standard is part of a series dealing with the influence of cementitious and associated non-
cementitious products/materials on water intended for human consumption, including:
— Part 1: Influence on organoleptic parameters and migration of organic substances (TOC) from factory made
cementitious products— Part 2: Influence of site-applied cementitious materials and associated non-cementitious products/materials on
organoleptic parameters— Part 3: Migration of substances from factory made cementitious products.
— Part 4: Migration of substances from site-applied cementitious materials and associated non-cementitious
products/materials.---------------------- Page: 5 ----------------------
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Introduction
With respect to any potential adverse effects of products and materials on the quality of water intended for human
consumption, it should be understood that relevant national regulations remain in force until verifiable European
acceptance criteria have been adopted.---------------------- Page: 6 ----------------------
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1 Scope
This European Standard specifies a method to determine the influence of factory made cementitious products on
the odour, flavour, colour, turbidity and total organic carbon (TOC) of test waters after contact with the products.
This European Standard is applicable to factory made cementitious products, e.g. cement mortar linings to metallic
pipes, tanks, concrete pipes, etc. intended to be used for the transport and storage of water for human
consumption, including raw water used for the production of drinking water.2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable
for its application. For dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.EN 196-1, Methods of testing cement - Part 1: Determination of strength
prEN 1420:2014,Influence of organic materials on water intended for human consumption - Determination of odour
and flavour assessment of water in piping systemsEN 1484, Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic
carbon (DOC)EN 1622:2006, Water quality - Determination of the threshold odour number (TON) and threshold flavour number
(TFN)EN 1015-2, Methods of test for mortar for masonry - Part 2: Bulk sampling of mortars and preparation of test
mortarsEN 1015-11, Methods of test for mortar for masonary - Part 11: Determination of flexural and compressive strength
of hardened mortarEN 10088-1:2014, Stainless steels - Part 1: List of stainless steels
EN 12350-1, Testing fresh concrete - Part 1: Sampling
EN 12390-1, Testing hardened concrete - Part 1: Shape, dimensions and other requirements for specimens and
mouldsEN 12390-2, Testing hardened concrete - Part 2: Making and curing specimens for strength tests
EN 27888, Water quality - Determination of electrical conductivity (ISO 7888)EN ISO 3696:1995, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)
EN ISO 7027:1999, Water quality - Determination of turbidity (ISO 7027:1999)EN ISO 7393-1, Water quality - Determination of free chlorine and total chlorine - Part 1: Titrimetric method using
N, N-diethyl-1,4-phenylenediamine (ISO 7393-1)EN ISO 7393-2, Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using
N, N-diethyl-1, 4-phenylenediamine, for routine control purposes (ISO 7393-2)EN ISO 7887:2011, Water quality - Examination and determination of colour (ISO 7887:2011)
EN ISO 9963-2, Water quality - Determination of alkalinity - Part 2: Determination of carbonate alkalinity
(ISO 9963-2)EN ISO 16264, Water quality - Determination of soluble silicates by flow analysis (FIA and CFA) and photometric
detection (ISO 16264)---------------------- Page: 7 ----------------------
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ISO 6058, Water quality - Determination of calcium content - EDTA titrimetric method
ISO 10523, Water quality - Determination of pH3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
appropriate body
certification body, inspection body or test laboratory, as relevant to a particular requirement
3.2cementitious product
factory made product containing a cementitious material supplied in the hardened state with a formed surface prior
to its incorporation into the construction works3.3
cementitious material
material that contains a hydraulic cement in sufficient proportion to act as the main binder by forming a hydrate
structure which governs the performance of the material3.4
associated non-cementitious product
product which is applied to the surface of a cementitious product, directly or indirectly, during manufacture (or
construction) and which either provides a porous seal to the product or which remains as a residue in contact with
water, e.g. porous seal coats, formwork release agents and curing compounds3.5
porous seal coat
polymeric (usually organic) materials applied in a thin (25 μm – 200 μm thickness) surface layer to a cement mortar
lining in order to restrict (but not prevent) interactions between the mortar and conveyed water
Note 1 to entry: See ISO 16132:2004, 3.6.3.6
proxy sample
sample of fresh mortar or fresh concrete taken from material to be used for the production of a factory made
product, either spray-applied to a laboratory test plate (mortar only) or cast into a mould (mortar or concrete) of
appropriate dimensions (e.g. standard cube, cylinder or prism, etc.) and compacted (where appropriate), cured and
hardened under conditions representative of those intended for the product3.7
fresh concrete
concrete that is fully mixed and still in a condition capable of being compacted by the chosen method
3.8fresh mortar
cement mortar that is fully mixed and still in a condition of being applied to a substrate by the chosen method
3.9odour
sensation perceived by means of the olfactory organ in sniffing certain volatile substances
[SOURCE: ISO 5492:2008, 3.18]3.10
flavour
complex combination of the olfactory, gustatory, and trigeminal sensations perceived during tasting
Note 1 to entry: The flavour may be influenced by tactile, thermal, painful and/or kinaesthetic effects.
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[SOURCE: ISO 5492:2008, 3.20]
3.11
colour of water
optical property that causes the changing of the spectral composition of transmitted visible light measured at three
wavelengths[SOURCE: EN ISO 7887:2011, 3.2]]
3.12
turbidity
reduction of transparency of a water due to the presence of undissolved matter
Note 1 to entry: See EN ISO 7027:1999, 3.1.
3.13
threshold odour number
TON
dilution ratio of the migration water with the reference water at the same temperature, beyond which this diluted
sample does not have any perceptible odourNote 1 to entry: See EN 1622.
3.14
threshold flavour number
TFN
dilution ratio of the migration water with the reference water at the same temperature, beyond which this diluted
sample does not have any perceptible flavourNote 1 to entry: See EN 1622.
3.15
total organic carbon
TOC
sum of organically bound carbon present in water, bonded to dissolved or suspended matter, including
cyanate,elemental carbon and thiocyanate[SOURCE: EN 1484:1997, 3.3, modified]
3.16
testing panel
group of people meeting the relevant requirements of EN 1622
3.17
test
technical operation that consists of the determination of one or more characteristics of a given product
3.18test procedure
specified technical method for performing a test
3.19
sample
one or more units, or a specified quantity, drawn from a batch or lot, selected at random for inspection, e.g. at the
factory or in a laboratory3.20
test piece
the sample or portion which is to be conditioned, treated or otherwise prepared to be tested to obtain a single test
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3.21
nominal diameter
DN/ID
DN/OD
numerical designation of the size of a component, which is a whole number approximately equal to the actual
dimensions in millimetresNote 1 to entry: This applies to either the internal diameter (DN/ID) or the external diameter (DN/OD).
3.22preconditioning
succession of contact periods of a test piece with the preconditioning water (3.22) before contact with the test water
3.23preconditioning water
water used for preconditioning prepared as described in 5.3.1
3.24
reference water
water described as without odour, flavour, colour and turbidity conforming to the requirements in 5.3.2
3.25test water
water used for testing purposes prepared as described in 5.3.3 and 5.3.4
3.26
migration water:
test water which has been in contact with a test piece under specified conditions
[SOURCE: EN 1622, 3.13]3.27
blank water
test water which has been kept at the same specified conditions as migration water but without contact with the test
piece3.28
tap water
drinking water distributed by a public supplier
Note 1 to entry: Tap water is used as a lubricant/coolant for the sawing and coring operations used to obtain test pieces
generally from products of large dimensions. See normative Annexes A, B and C.3.29
demineralized water
water conforming to the requirements in EN ISO 3696:1995 for Grade 3
4 Principle
Each test piece is subjected to a specified preconditioning procedure where the surface which, in practice, will be
exposed to water intended for human consumption is brought into contact with preconditioning water during five
sequential periods: three periods of 24 h, 1 period of 72 h and a final period of 24 h.
The preconditioned test piece is then brought into contact with test water, chlorinated and/or chlorine-free during
three sequential migration periods. A migration period is either:a) 72 h at (23 ± 2) °C for products intended to come into contact with chlorinated or chlorine-free cold water;
b) 24 h at a specified elevated temperature for products intended to come into contact with warm or hot chlorine-
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After each contact period, each migration water is assessed for odour, flavour, colour, turbidity and TOC.
NOTE The selection of:a) the appropriate test water, chlorinated and/or chlorine-free, from those made available in this European Standard,
b) the temperature of the test water,c) the need for chlorination during preconditioning
is specified in product or system standards or in national or European regulations, as appropriate.
5 ReagentsUse only reagents of analytical quality unless otherwise stated.
5.1 Chlorine neutralization reagents
5.1.1 Ascorbic acid solution, prepared by dissolving (4,0 ± 0,1) g of ascorbic acid in one litre of reference water
(5.3.2).This ascorbic acid solution shall be replaced on a monthly basis.
5.1.2 Sodium thiosulfate solution, comprising a solution of 3,5 g/l of sodium thiosulfate pentahydrate (Na S O
2 2 3.5H O) and stored in the absence of light at a temperature below 10 °C, for a maximum of 4 months.
Sodium hypochlorite solution, prepared from a commercial solution of sodium hypochlorite (NaOCl) and have a
known concentration of ± 0,1 % by mass of free chlorine determined in accordance with either EN ISO 7393-1 or
EN ISO 7393-2.This sodium hypochlorite solution is unstable and shall be prepared on the day of use.
5.2 Sodium hypochlorite solution, prepared from a commercial solution of sodium hypochlorite (NaOCl) and
have a known concentration of about 0,1 % by mass of free chlorine determined in accordance with either
EN ISO 7393-1 or EN ISO 7393-2.This sodium hypochlorite solution is unstable and shall be prepared on the day of use.
5.3 Waters to be used for testing5.3.1 Preconditioning water prepared by dissolving (222 ± 2) mg anhydrous calcium chloride (CaCl ) and
(336 ± 2) mg sodium hydrogen-carbonate (NaHCO ) in one litre of demineralized water (3.29). The pH is
determined in accordance with ISO 10523 and adjusted to 7,4 ± 0,1 by bubbling air and/or CO into the solution.
NOTE The target total hardness is 200 mg/l as CaCO and the target alkalinity is 244 mg/l as HCO .
3 35.3.2 Reference water, a natural water without gas and with parameters that conform to the requirements given
in Table 1.When a reference water is chlorinated to 1,0 mg/l free chlorine and then dechlorinated after 72 h with either the
ascorbic acid solution (5.1.1) or the sodium thiosulfate solution (5.1.2), its organoleptic parameters, odour, flavour
colour and turbidity shall conform to the requirements given in Table 1.---------------------- Page: 11 ----------------------
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Table 1 — Reference water
Parameter Requirement Unit
Test method
Conductivity EN 27888 500 ± 50 µS/cm
pH ISO 10523 7,3 ± 0,2 pH unit
Calcium ISO 6058 80 ± 10 mg Ca/l
Alkalinity EN ISO 9963-2 350 ± 50 mg HCO /l
Silica EN ISO 16264 15 ± 5 mg SiO /l
Odour EN 1622 < 2 TON
Flavour EN 1622 < 2 TFN
Colour < 0,1 -1
EN ISO 7887 m
Turbidity < 0,1 FNU
EN ISO 7027
TOC EN 1484 < 0,2 mg C/l
Alternative methods, either calibrated against the reference methods or which have proven comparable analytical
performance, may be used.See Clause 5.
See Clause 6.
5.3.3 Test water without chlorine content (chlorine-free), shall consist of a batch of reference water (5.3.2)
used for contact with test pieces and preparation of the blank water (3.27).5.3.4 Test water with chlorine content (chlorinated), consisting of reference water (see 5.3.2) with a free
chlorine content of (1,0 ± 0,2) mg/l as Cl , determined in accordance with either EN ISO 7393-1 or EN ISO 7393-2,
after addition of sodium hypochlorite solution (5.2).5.4 Cleaning liquids for apparatus
Use one of the following cleaning liquids:
— non-perfumed biodegradable detergent;
— hydrochloric acid, 2 mol/l;
— nitric acid, 10 % or 1,5 mol/l.
6 Apparatus
6.1 General
For cleaning the glassware, and appropriate apparatus, before use, the following general requirements apply:
a) Clean the glassware to be used, using detergent (5.4). Rinse the glassware in demineralized water (3.29);
b) Clean the inner surface of the glassware with hydrochloric acid (5.4) and rinse it with demineralized water. For
stainless steel, clean with nitric acid (5.4) and then rinse with demineralized water;
c) Before use, rinse the glassware, and appropriate apparatus, at least three times using preconditioning water
before preconditioning (8.3) or reference water before the test procedure (Clause 9).
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6.2 Apparatus and materials for test piece preparation (see Annexes A, B and C)
6.2.1 Stainless steel plates and cylinders
6.2.1.1 Stainless steel
Stainless steel shall be austenitic, super austenitic or duplex grades in accordance with the corresponding
numerical designations, 1.4301, 1.4436, 1.4429, 1.4259 or 1.4462 in EN 10088-1:2014 for stainless steels.
NOTE The grades above are specified for the use of stainless steel as reinforcement in concrete. Therefore, they are
considered to be inert when used in contact with cementitious proxy samples (see Annexes A, B and C).
6.2.1.2 PlatesIn order to provide a sufficient volume of migration water for assessment, the surface area of one face of a plate
2 2should be between 10 000 mm and 90 000 mm . The length/width of the plates should be selected to be
consistent with the dimensions of the test container and the volume of test water in which they will be immersed.
6.2.1.3 CylindersThe diameter and length of a cylinder should be consistent with the dimensions of the test piece (see Annexes A, B
or C and Annexes D and E) and the volume of test water appropriate to the specified S/V ratio given in 7.3.
6.2.2 Glass cylindersThe diameter and length of a glass cylinder should be consistent with the dimensions of the test piece (see
Annexes A, B or C and Annexes D and E) and the volume of test water appropriate to the specified S/V ratio given
in 7.3. Glass cylinders should be provided with suitable external (opaque) shielding for use during migration
procedures (test pieces and blanks), in order to minimize exposure of migration waters to ambient light.
6.2.3 Moulds for forming test piecesMoulds for forming prisms of mortar shall conform to the requirements of EN 196-1, as specified for use in
EN 1015-11, or to EN 12390-1 for forming cubes/cylinders of concrete, with modifications to materials and
dimensional tolerances as specified in Annex A, B or C, as appropriate.Clean moulds and any filling frame used with a mould, by thoroughly washing with non-perfumed detergent (5.4)
and tap water (3.28), rinsing with copious amounts of tap water, followed by a final rinse with demineralized water
(3.29) and dry before use.If a factory made cementitious product has been formed in a process where its entire contact surface has been in
contact with a release agent and if proxy samples (3.6) are used, the same release agent shall be applied to the
internal surfaces of the mould, otherwise the use of release agents is not permitted.
6.3 Apparatus and materials for preconditioning and migration procedure6.3.1 Vessels, containers, covers, connectors and stoppers, made of materials which do not affect the
odour, flavour, colour and turbidity assessment under the specified test conditions such as glass,
polytetrafluoroethylene (PTFE) or stainless steel.The material PTFE should only be used if there is a small contact area with the test water. Thus PTFE is unsuitable
for containers.6.3.2 Equipment, capable of maintaining the test temperature within ± 2°C for the duration of the test.
6.3.3 If required, sealants that do not affect the odour, flavour, colour and turbidity assessments under the
specified test conditions.---------------------- Page: 13 ----------------------
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6.4 Apparatus for odour and flavour assessment
6.4.1 Erlenmeyer and volumetric flasks, beakers, measuring cylinders, immersion tanks, volumetric
pipettes, funnels and stoppers made of glass, PTFE or stainless steel.The material PTFE should only be used if there is a small contact area with the test water. Thus PTFE is unsuitable
for containers.6.4.2 Testing vessels, comprising the following glassware (which shall be reserved for odour and flavour
assessment only and cleaned separately from other items): testing bottles for odour assessment and testing
glasses for flavour assessment conforming to the requirements given in EN 1622.6.4.3 Waterbath or incubator, conforming to the requirements of EN 1622.
6.5 Apparatus for colour and turbidity assessment
6.5.1 Apparatus for the determination of colour, conforming to the requirements of EN ISO 7887:2011,
Clause 5.6.5.2 Apparatus for the determination of turbidity, conforming to the requirements of EN ISO 7027:1999,
6.1.3.6.6 Apparatus for the determination of TOC, conforming to the requirements of EN 1484.
6.7 500 ml Erlenmeyer flasks with ground stoppers shall be used for the determination of TON and TFN for the
presentation of the dilution series to the panellists.7 Samples and test pieces
7.1 Sampling, transport and storage of samples
Carry out sampling of factory made products in accordance with the relevant product standard, system standard or
the national or European regulations, or the relevant Annex to this European Standard, as appropriate.
Take care that the transport conditions do not influence the test results.If it is neces
...
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