CAJ | 학술논문

强酸性条件下,钯(Ⅱ)与2-[(5-氯-2-吡啶)偶氮]-5-二甲氨基苯胺(5-Cl-PADMA)及溴化十六烷基三甲铵(CTMAB)可生成络合物,络合物经0.22m m孔径的混合纤维素膜富集后,用小体积的混合有机溶剂(乙二醇单甲醚和N,N-二甲基甲酰胺)溶解,加入一定量的混合基体改进剂(抗坏血酸和氯化铵)后,用石墨炉原子吸收法(GFAAS)测定其中的钯含量.实验结果表明,钯含量在0.2~2.3ng/mL和2.3~7ng/mL范围内线性关系良好,检出限为0.03ng/mL,用于矿石、土壤样品中痕量钯的测定,结果令人满意.
강산성조건하,파(Ⅱ)여2-[(5-록-2-필정)우담]-5-이갑안기분알(5-Cl-PADMA)급추화십륙완기삼갑안(CTMAB)가생성락합물,락합물경0.22m m공경적혼합섬유소막부집후,용소체적적혼합유궤용제(을이순단갑미화N,N-이갑기갑선알)용해,가입일정량적혼합기체개진제(항배혈산화록화안)후,용석묵로원자흡수법(GFAAS)측정기중적파함량.실험결과표명,파함량재0.2~2.3ng/mL화2.3~7ng/mL범위내선성관계량호,검출한위0.03ng/mL,용우광석、토양양품중흔량파적측정,결과령인만의.
A method for the preconcentration and determination of trace Pd(II) by graphite furnace atomic absorption spectrometry (GFAAS) was described. It was based on the formation of Pd(II)-2-(5-chloro-2-pyridylazo)-5-dimethylaminoaniline (5-Cl-PADAM)-exadecyltrimethylammonium bromide (CTMAB) complex in heavy acid medium. The complex was collected on a soluble membrane filter and the detection of the solution obtained after dissolving and analyzing the membrane in a proper solvent. The conditions for the formation and collection of the complex including pH, effect of surfactants, aperture of the membrane filter, effect of matrix modifiers etc. were optimized. Under the optimized conditions, the linear range was found in the range of 0.2~2.3ng× mL-1 and 2.3~7ng× mL-1 with the R=99.95% and R=99.98% respectively. The limit of detection achieved was 0.03ng× mL-1 after separation. The method was used for the determination of the soil and ore samples with satisfaction.