ISO 20541:2008
Current
The latest, up-to-date edition.
Milk and milk products — Determination of nitrate content — Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction
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26-08-2008
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ISO 20541|IDF 197:2008 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.
| DevelopmentNote |
Supersedes ISO/DIS 20541. (08/2008) Also numbered as IDF 197. (09/2008)
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| DocumentType |
Standard
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| Pages |
15
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| PublisherName |
International Organization for Standardization
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| Status |
Current
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| Standards | Relationship |
| DIN EN ISO 20541:2008-12 | Identical |
| NF EN ISO 20541 : 2008 | Identical |
| GOST R ISO 20541 : 2011 | Identical |
| NBN EN ISO 20541 : 2008 | Identical |
| NEN EN ISO 20541 : 2008 | Identical |
| NS EN ISO 20541 : 1ED 2008 | Identical |
| I.S. EN ISO 20541:2008 | Identical |
| PN EN ISO 20541 : 2010 | Identical |
| SN EN ISO 20541:2008 | Identical |
| UNI EN ISO 20541 : 2009 | Identical |
| UNE-EN ISO 20541:2009 | Identical |
| BS EN ISO 20541:2008 | Identical |
| EN ISO 20541:2008 | Identical |
| ISO 707:2008 | Milk and milk products — Guidance on sampling |
| ISO 1042:1998 | Laboratory glassware — One-mark volumetric flasks |
| ISO 648:2008 | Laboratory glassware — Single-volume pipettes |
| ISO 835:2007 | Laboratory glassware — Graduated pipettes |
| ISO 565:1990 | Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings |
| EN 12014-3:2005 | Foodstuffs - Determination of nitrate and/or nitrite content - Part 3: Spectrometric determination of nitrate and nitrite content of meat products after enzymatic reduction of nitrate to nitrite |
| ISO 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
| ISO 3696:1987 | Water for analytical laboratory use — Specification and test methods |
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