Contents Foreword 1 Scope 2 Normative References 3 Principle 4 Reagents and materials 5 Instruments 6 Sample preparation and preservation 7 Determination steps 8 Calculation of results 9 Detection of the lower limit (LOD) and the limit of quantitation (LOQ) 8 10 Precision Annex A (Informative) Tandem mass spectrum diagram of standard substance |