GB 5009.13-2017 Translated English of Chinese Standard. GB5009.13-2017: National food safety standard - Determination of copper in foodshttps://www.chinesestandard.net, 2. 12. 2017 - Počet stran: 16 This standard specifies the determination of copper content in food by graphite furnace and flame atomic absorption spectrometry, inductively coupled plasma mass spectrometry and inductively coupled plasma-atomic emission spectrometry. |
Obsah
| 3 | |
Scope | 4 |
Instruments and equipment | 5 |
Analytical procedures | 6 |
Presentation of analytical results | 8 |
Precision | 9 |
Reagents and materials | 10 |
Instruments and equipment | 11 |
Presentation of analytical results | 12 |
Precision | 13 |
Appendix A Microwave digestion temperature rising program | 14 |
Appendix B Instrument reference conditions of graphite furnace atomic absorption spectrometry | 15 |
Flame atomic absorption spectrometry instrument reference conditions | 16 |
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1000 mL volumetric accurate to 0.001 accurately PIPETTE 0.500 ammonium dihydrogen phosphate-palladium amount of nitric Analytical balance arithmetic mean atomic absorption spectrometry blank solution concentration of copper copper content copper element Copper standard intermediate copper standard series Copper sulfate pentahydrate Determination of copper digestion inner tank digestion temperature rising dihydrogen phosphate-palladium nitrate emission spectrometry furnace atomic absorption g accurate Graphite furnace atomic hollow cathode lamp inductively coupled plasma Instrument reference conditions intermediate solution 1.00 liquid sample magnesium manganese mass concentration MEASURE 250 mL mg/kg or mg/L Microwave digestion temperature milligram milliliters MIX it uniformly mL of copper mL of nitric mL volumetric flask nitric acid solution Perchloric acid phosphate-palladium nitrate solution polytetrafluoroethylene digestion inner reagent blank test result is retained sample or accurately sample solution series for quantitative solution 1000 mg/L standard intermediate solution standard series solution standard stock Standard substance stock solution 1000 Teflon temperature rising program volume reach zinc