This standard specifies method for determination of protein content in foods.
The first method and the second method of this standard is applicable to protein determination of all kinds of foods, the third method is applicable to screening determination of solid samples such as grains, peas, milk powder, rice flour and protein powder, the protein content of which is above 10g/100g.
This standard is not applicable to the determination of foods containing inorganic nitrogenous substance and organic non-protein nitrogenous substance.
Foreword I 1 Scope 2 Normative References 3 Principles 4 Reagents and Materials 5 Instruments and Equipments 6 Analytical Procedure 7 Expression of Analytic Result 8 Precision 9 Principles 10 Reagents and Materials 11 Instruments and Equipments 12 Analytical Procedure 13 Calculation (expression) of Analytic Result 14 Precision 15 Principles 16 Instruments and Equipments 17 Analytical Procedures 18 Expression of Analysis Results 19 Precision 20 Others
