EN ISO 14673-2:2004

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
   4.1 Nitrate determination
   4.2 Nitrite determination
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
   8.1 Cheese
   8.2 Dried milk products and infant food
   8.3 Milk and liquid milk products
9 Procedure
   9.1 Preparation of the reduction column
   9.2 Checking the reducing capacity of the column
   9.3 Determination of nitrate content
   9.4 Determination of nitrite content
   9.5 Calibration curve
   9.6 Checking the drift of standard solutions
10 Calculation and expression of results
   10.1 Calculation
   10.2 Expression of results
11 Precision
   11.1 General
   11.2 Nitrite content
   11.3 Nitrate content
12 Test report
Bibliography

ISO 14673-2|IDF 189-2:2004 specifies a routine method for the determination of the nitrate and nitrite contents of milk and milk products by segmented flow analysis. The method is applicable to milk, cheese, and liquid and dried milk products and infant foods.