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SN EN ISO 14673-1 : 2004
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The latest, up-to-date edition.
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MILK AND MILK PRODUCTS - DETERMINATION OF NITRATE AND NITRITE CONTENTS - PART 1: METHOD USING CADMIUM REDUCTION AND SPECTROMETRY
12-01-2013
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
8.1 Dried milk and dried whey
8.2 Caseins and caseinates
8.3 Cheese
8.4 Whey cheese
9 Procedure
9.1 Preparation of the copperized cadmium
column
9.2 Checking the reducing capacity of the
column
9.3 Regeneration of the column
9.4 Preparation of test portion
9.5 Extraction and deproteination
9.6 Reduction of nitrate to nitrite
9.7 Blank test
9.8 Determination
9.9 Preparation of calibration graph
10 Calculation and expression of results
10.1 Nitrite content
10.2 Nitrate content
11 Precision
11.1 General
11.2 Repeatability
12 Test report
Bibliography
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