Atomic Absorption Spectrophotometry (AAS) has the advantages of rapidity, sensitivity and accuracy in the determination of trace metal elements. It has become an ideal method for the determination of metal impurities in drugs, and has become a routine means for some foreign pharmaceutical factories and hospitals to control the quality of drugs. Na, K, Ca, Mg are relatively impurities in water sources, medicinal materials, and containers, and are widely present in various drugs. Determination of these elements has certain value for understanding the concentration of metal ions in injection and examining the process quality and pharmacological effects. This paper uses GBC series atomic absorption to establish a method for the determination of Ca, Mg, K, Na metal content in injection, for the reference of relevant quality control personnel such as injection production process level. attachment download