DIN EN ISO 20541:2008
Milk and milk products - Determination of nitrate content - Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (ISO 20541:2008); German version EN ISO 20541:2008

Standard No.

DIN EN ISO 20541:2008

Release Date

2008

Published By

German Institute for Standardization

Status

Be replaced

Replace By

DIN EN ISO 20541:2008-12

Latest

DIN EN ISO 20541:2008-12

Replace

DIN 10476:2001 DIN EN ISO 20541:2006

Scope

This International Standard specifies a method for the determination of the nitrate content of milk and milk products by molecular-absorption spectrometry after Griess reaction (preceded by enzymatic reduction). The method is, in particular, applicable to whole, partly skimmed, skimmed and dried milk, hard, semi-hard and soft cheeses, processed cheese, whey cheese, caseins, caseinates, dried whey and milk protein concentrates. The method can be used at contents corresponding to a measured concentration in the sample solution (with blank subtracted) of more than 0,2 mg/l.

DIN EN ISO 20541:2008 Referenced Document

• ISO 1042 Laboratory glassware - One-mark volumetric flasks
• ISO 3696 Water for analytical laboratory use; Specification and test methods
• ISO 565 Test sieves; metal wire cloth, perforated metal plate and electroformed sheet; nominal sizes of openings
• ISO 648 Laboratory glassware - Single-volume pipettes
• ISO 835 Laboratory glassware - Graduated pipettes

DIN EN ISO 20541:2008 history

• 2008 DIN EN ISO 20541:2008-12 Milk and milk products - Determination of nitrate content - Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (ISO 20541:2008); German version EN ISO 20541:2008
• 2008 DIN EN ISO 20541:2008 Milk and milk products - Determination of nitrate content - Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (ISO 20541:2008); German version EN ISO 20541:2008
• 0000 DIN EN ISO 20541:2006
• 2001 DIN 10476:2001 Determination of nitrite and nitrate content of milk products - Enzymatic method (color test)

DIN EN ISO 20541:2008 Milk and milk products - Determination of nitrate content - Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (ISO 20541:2008); German version EN ISO 20541:2008 has been changed from DIN 10476:2001 Determination of nitrite and nitrate content of milk products - Enzymatic method (color test).