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镍是用原子吸收法有效测定的元素之一,然而,当镍含量很低时,用通常的火焰原子吸收法测定是有困难的。APDC—MIBK萃取之后,用微量进样技术火焰原子吸收法能成功地测定粮食中的微量镍。用单纯形法优化测定条件,利用均匀设计表构造初始单纯形可以加快优化速度,用这种方法得到的优化条件是:空气压力1.08kg/cm~2;乙炔压力0.05kg/cm~2;燃烧器高度9mm;灯电流6mA。
Nickel is one of the elements that can be effectively measured by atomic absorption. However, when the nickel content is low, it is difficult to measure by conventional flame atomic absorption spectrometry. After APDC-MIBK extraction, trace amounts of nickel in food can be successfully determined by flame atomic absorption spectrometry with microinjection. Optimization of measurement conditions by the simplex method, the use of uniform design table to construct the initial simplex can speed up the optimization speed, the optimal conditions obtained by this method are: air pressure 1.08kg / cm ~ 2; acetylene pressure 0.05kg / cm ~ 2; combustion Height 9mm; lamp current 6mA.