[Direct determination of copper and manganese in Pinellia ternata by atomic absorption spectrometry using secondary sensitive wavelength].
A method for the direct determination of copper and manganese in Pinellia ternata by flame atomic absorption spectrometry with secondary sensitive wavelength was developed. This method can greatly decrease the analytical errors caused by small amount of samples orbig dilution multiple, so its accuracy is better than that with normal atomic absorption spectrometry using sensitive line when determining Cu-rich and Mn-rich Pinellia ternata samples. The detection limits of Cu-rich and Mn-rich are 0-25 mg x (-1) and 0-12 mg x L(-1), the relative standard deviations are 0.42% and 0.66%, and the recovery rates 96%-103% and 97%-102%, respectively. It was found that the method is simple, rapid, useful, accurate and free from the interference of coexistent ions. It has been widely applied to the determination of Pinellia ternata samples with satisfactory results.
Wang
Yuan-Zhong
YZ
Laboratory of Ecological Genetics, College of Life Science, Yunnan University, Kunming 650091, China.
Li
Tao
T
Fang
Bo
B
Fang
Xiang-Jing
XJ
Su
Wei-Geng
WG
Zhang
Quan-Ying
QY
D003300:Copper / Q000032:analysis*; D008345:Manganese / Q000032:analysis*; D030021:Pinellia / Q000737:chemistry*; D013054:Spectrophotometry, Atomic / Q000379:methods*
D008345:Manganese; D003300:Copper