【摘要】 提出了β-环糊精交联树脂富集,石墨炉原子吸收光谱法测定地质样品的铂的分析方法。考察了温度、盐酸浓度以及粒度等对β-环糊精交联树脂富集铂的影响。用硫脲作为洗脱剂,加入抗坏血酸作为基体改进剂,采用石墨炉原子吸收光谱法测定,检出限为0.043mg/L,精密度(C=0.35mg/L,n=5)为8.86%,特征质量为6.70pg,结果令人满意。更多还原

【Abstract】 A method is described for the enrichment of platinum in geological samples with β-cyclodextrin cross-linking polymer, Vitamin C was used as matrix modifier after eluted by （NH₄）₂CS and determined by graphite furnace atomic absorption spectrometry. Temperature, concentration of HCl and time that may affect the adsorption of platinum on β-cyclodextrin cross-linking polymer were studied, and the elution conditions were also exploved. The result showed that the adsorption would be best when shaking for 1 h in 0.1 mol/L HCl and at 25℃. The characteristic mass, detection limit and relative standard deviation are 6.70 pg, 0.043 mg/L, 8.9%（C=0.35 mg/L,n=5）, respectively.更多还原