التطبيقات

1 نظرة عامة على الطريقة

After sample pretreatment, lead ions form a complex with sodium diethyldithiocarbamate (DDTC) under a specific pH condition. The complex is extracted and separated using 4-methyl-2-pentanone (MIBK), then introduced into an atomic absorption spectrometer for flame atomization. Absorbance is measured at a wavelength of 283.3 nm. Within a certain concentration range, the absorbance of lead is proportional to its mass content, and quantification is performed by comparison with a standard series.

2 نطاق التطبيق

This method applies to the determination of lead in sodium pyrophosphate food additive.

3 Reference Standards

GB 25557-2010 National Food Safety Standard – Food Additive Sodium Pyrophosphate, Section A.10 Determination of Lead

4 Instruments, Equipment and Reagents

4.1 الأدوات والمعدات

4.1.1 Analytical Instruments

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