分析中药中的铅（Pb）元素（火焰法）

Rootstocks, etc., easily affected by metals in soil are used as the raw materials of crude drugs. 
Therefore, the heavy metals standards, calculated as lead, are described for each heavy metal under 
the heavy metals tests of the Japanese Pharmacopoeia. Lead in kampo medicines prepared by 
combining crude drugs is analyzed during the quality control processes, etc. The ZA3000 series 
instruments employ the polarized zeeman correction method for the background corrections even in 
the flame method. As good baseline stability is provided, lead at a level of about 0.05 mg/L can be 
sufficiently analyzed and a good addition recovery can be obtained.

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