EN 16320:2013+A1:2017
(Main)Fertilizers and liming materials - Determination of mercury by vapour generation (VG) after aqua regia dissolution
Fertilizers and liming materials - Determination of mercury by vapour generation (VG) after aqua regia dissolution
This European Standard specifies a method for the determination of the content of mercury in fertilizers and liming materials after extraction with aqua regia and the detection of mercury by vapour generation (VG) coupled to an atomic absorption spectrometer or an inductively coupled plasma-atomic emission spectrometer. A limit of quantification of 0,01 mg/kg is to be expected.
NOTE The term fertilizer is used throughout the body of this European Standard and includes liming materials unless otherwise indicated.
Düngemittel und Kalkdünger - Bestimmung von Quecksilber mit Verdampfungstechnik (VG) nach Königswasseraufschluss
Engrais et amendements minéraux basiques - Détermination du mercure par génération de vapeur (VG) après digestion à l'eau régale
Gnojila in sredstva za apnjenje - Določevanje živega srebra s tehniko hladnih par po raztapljanju v zlatotopki (vključno z dopolnilom A1)
Ta evropski standard določa metodo za določevanje vsebnosti živega srebra v gnojilih in sredstvih za apnjenje po ekstrakciji z zlatotopko in določevanje živega srebra s tehniko hladnih par (VG) z atomskim absorpcijskim spektrometrom ali atomskim emisijskim spektrometrom z induktivno sklopljeno plazmo. Pričakovana je meja kvantifikacije 0,01 mg/kg. OPOMBA: Izraz »gnojilo« se uporablja v celotnem glavnem delu tega evropskega standarda in vključuje sredstva za apnjenje, če ni navedeno drugače.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Düngemittel und Kalkdünger - Bestimmung von Quecksilber mit Verdampfungstechnik (VG) nach KönigswasseraufschlussEngrais et amendements minéraux basiques - Détermination du mercure par génération de vapeur (VG) après digestion à l'eau régaleFertilizers and liming materials - Determination of mercury by vapour generation (VG) after aqua regia dissolution65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 16320:2013+A1:2017SIST EN 16320:2013+A1:2017en,fr,de01-december-2017SIST EN 16320:2013+A1:2017SLOVENSKI
STANDARDSIST EN 16320:20131DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16320:2013+A1
February
t r s y ICS
x wä r z r English Version
Fertilizers and liming materials æ Determination of dissolution Engrais et amendements minéraux basiques æ Détermination du mercure par génération de vapeur
Düngemittel und Kalkdünger æ Bestimmung von Königswasseraufschluss This European Standard was approved by CEN on
t { August
t r s u and includes Amendment
s approved by CEN on
s s December
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
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t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x u t rã t r s u ªA sã t r s y ESIST EN 16320:2013+A1:2017
Results of the inter-laboratory test . 15 Bibliography . 16
approximately 1,18 g/ml. 6.3 Nitric acid, c(HNO3) = 16 mol/l; not less than 65 % volume fraction,
approximately 1,42 g/ml. 6.4 Mixed acid solution of 0,8 mol/l nitric acid and 1,8 mol/l hydrochloric acid. Mix 150 ml of hydrochloric acid (6.2) and 50 ml nitric acid (6.3) to 1,0 l of water (6.1). 6.5 Standard stock solution, mercury standard stock solution, e.g.
= 1 000 mg/l. Use suitable stock solutions. Single-element stock solutions with adequate specification stating the acid used and the preparation technique are commercially available. It is recommended to use commercially available standard stock solutions for mercury. 6.6 Working standard solutions. Depending on the scope, different working standard solutions may be necessary. In general, the stability of mercury working standard solutions should be checked. 6.6.1 Working standard solution I,
= 10 mg/l for mercury. Dilute 1,00 ml of the standard stock solution for mercury (6.5) to 100,0 ml with the mixed acid solution (6.4). This solution is used to prepare 200 µg/l mercury working standard solution. 6.6.2 Working standard solution II,
= 200
Dilute 2,00 ml of the 10 mg/l mercury working standard solution I (6.6.1) to 100,0 ml with the mixed acid solution (6.4). This solution is used to prepare spiked test solutions and calibration solutions. 6.7 Reducing agents. 6.7.1 General. Tin(II) chloride or sodium borohydride may be used as the reducing agent, but it is not advisable to use the two reagents alternately. Observe the instructions of the manufacturers of the apparatus. The concentration by mass of the reducing agent solutions may be varied to suit the system, and the relevant information provided by the manufacturer of the apparatus shall be observed. 6.7.2 Tin(II) chloride solution, (SnCl2·2H2O) = 100 g/l. Dissolve 50 g of tin(II) chloride in approximately 100 ml of hydrochloric acid (6.2) in a 500 ml volumetric flask and dilute to the mark. Prepare a fresh solution daily. SIST EN 16320:2013+A1:2017
= 2 g/l. Dissolve 2 g of sodium hydroxide pellets in water, add 2 g of sodium borohydride and dilute to 1 000 ml with water (6.1). Prepare a fresh solution daily and, when necessary, filter before use. When the analysis procedure is of a longer time, it is recommended to cool the sodium borohydride solution (i.e. with ice around the flask) during its use in the vapour generation ICP-AES or AAS measurement. WARNING — It is essential to observe the safety instructions for working with sodium borohydride. Sodium borohydride forms hydrogen with acids and this can result in an explosive air/hydrogen mixture. A permanent extraction system shall be provided at the point where measurements are carried out. 7 Apparatus 7.1 Comm
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