流动注射-导数火焰原子吸收光谱测定植物油中的镍、锰、铬和铅

Determintion of Trace Nickel, Manganese, Chromium and Lead in Vegetable Oils by Derivative-Flame Atomic Absorption Spectrometry Combined with Flow-Inject Technique

中文关键词:  流动注射  导数火焰原子吸收  植物油  镍  锰  铬  铅

英文关键词:flow-injection  derivative FAAS  vegetable oil  nickel  manganese  chromium  lead

中文摘要:

      提出了流动注射-导数火焰原子吸收光谱测定植物油中微量镍、锰、铬和铅的新方法.流动注射进样技术克服了常规火焰原子吸收法耗样量大和基体干扰严重的缺点.导数技术应用于火焰原子吸收可提高方法的灵敏度和信号的选择性.流动注射与导数技术相结合应用于火焰原子吸收成功地测定了常规火焰原子吸收法和流动注射-火焰原子吸收法难以测定的植物油中微量镍、锰、铬和铅.镍、锰、铬和铅的特征浓度(μg/mL),分别为0.005、0.003、0.006 7、0.025,相对标准偏差在0.3%～2.8%的范围内.

英文摘要:

      A new method was proposed to determine trace nickel,manganese,chromium and lead in vegetable oils by flow-injection derivative-flame atomic absorption spectrometry. The flaws that sampling is large and matrix interference is serious in conventional flame atomic absorption spectrometry(FAAS) were overcome by flow-injection sampling technique. The sensitivity and signal selectivity were enhanced when derivative technique was used in flame atomic absorption spectrometry. The results of determinations of nickel,manganese,chromium and lead in vegetable oils was satisfactory by derivative-flame atomic absorption spectrometry combined with flow-injection, which was not done by conventional FAAS or flow-injection FAAS. Their sensitivities were 0.005 4 μg/mL,0.003 4 μg/mL,0.006 7 μg/mL,0.025 μg/mL respectively,the relative standard deviation was in 0.3%～2.8%.