EN ISO 14673-3:2004

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 Cheese
9 Procedure
   9.1 Checking the reducing capacity of the cadmium
        column
   9.2 Regeneration of the cadmium column
   9.3 Test portion
   9.4 Extraction
   9.5 Determination of nitrite content
   9.6 Determination of nitrate content
10 Calculation and expression of results
   10.1 Nitrite content
   10.2 Nitrate content
11 Precision
   11.1 General
   11.2 Nitrite content
   11.3 Nitrate content
12 Test report
Bibliography

ISO 14673-3|IDF 189-3:2004 specifies a routine method for the determination of the nitrate and nitrite contents of milk and milk products by cadmium reduction and flow injection analysis (FIA). The method is applicable to hard, semi-hard and soft cheeses of various ages, and processed cheese. The detection limits of the method are 0,5 mg of nitrate ions per kilogram and 1,0 mg of nitrite ions per kilogram, respectively.The method is also applicable to whey powder, milk powder and milk-based infant food.