Direct Determination of Copper and Manganese in Pinellia Ternata by Atomic Absorption Spectrometry Using Secondary Sensitive Wavelength
WANG Yuan-zhong1,LI Tao2,FANG Bo1,3,FANG Xiang-jing3*,SU Wei-geng3,ZHANG Quan-ying2
1. Laboratory of Ecological Genetics,College of Life Science,Yunnan University,Kunming 650091，China 2. Department of Geographical Science,Yuxi Teacher’s College,Yuxi 653100，China 3. Yunnan Academy of Forestry,Kunming 650204，China
Abstract：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 or big 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·L-1 and 0-12 mg·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.
Key words：Secondary sensitive wavelength;Atomic absorption spectrometry;Pinellia ternata;Copper and Manganese
王元忠1,李涛2,方波1,3,方向京3*,苏为耿3,张全英2 . 半夏中铜和锰的原子吸收光谱直接测定方法[J]. 光谱学与光谱分析, 2008, 28(03): 690-692.
WANG Yuan-zhong1,LI Tao2,FANG Bo1,3,FANG Xiang-jing3*,SU Wei-geng3,ZHANG Quan-ying2 . Direct Determination of Copper and Manganese in Pinellia Ternata by Atomic Absorption Spectrometry Using Secondary Sensitive Wavelength. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(03): 690-692.
