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Application notes
Analysis of Pb in Kampo Medicine(Kakkontou) (Flame Method)
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.
Standard curve of Pb
Flame AAS measurement of Pb standards and Kakkontou solution
Kakkontou
Hitachi ZA3000 AAS
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