DIN EN ISO 20541-2008 奶和奶制品.硝酸盐含量的测定.酶还原反应和Griess反应后分子吸收光谱法(ISO 20541-2008).德文版本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
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.