纳米氧化铝负载双硫腙分离富集-原子吸收法测定地质样品中的金、铂、钯的研究

金、铂、钯在地质样品中的含量甚微,国内外常采用ICP-AES,ICP-MS和ETAAS直接测定。FAAS法由于仪器便宜、操作方便,也广泛应用于预富集后的痕量贵金属的分析。目前,在测定贵金属的分析方法中,常采用固相萃取法富集分离样品,主要的固相萃取剂有:无机吸附剂,交联树脂[1],螯合树脂[     

Determination of Adrenaline by Atomic Absorption Spectrometry Using Copper as Probe Reagent in Pharmaceutical and Serum Samples

In this paper, an atomic absorption spectrometric method has been established to determine adrenaline using Cu(II) as probe reagent. In the presence of SCN^?, it has been demonstrated that Cu(II) is reduced to Cu(I) by adrenaline at pH 6.0, and the in situ formed Cu(I) reacts with SCN‐ to form the white emulsion of CuSCN. According to the amount of residual Cu(II) which is measured by atomic absorption spectrometry, the amount of adrenaline can be determined indirectly. Beer's law is obeyed in the range of adrenaline concentration of 0.080‐6.00 mg mL‐1, and the linear regression equation is A = 0.20342 ‐ 0.02756C (μg mL^?1) with a correlation coefficient of 0.9998. The detection limit is 0.033 μg mL^?1 and R.S.D. is 0.56%. This method has been successfully applied to determine adrenaline in pharmaceutical and serum samples with satisfactory results.     

光温控制石墨炉原子吸收法测定人血清和人发中Se的含量

用光温控制石墨炉原子吸收法测定人血清和人发中Ｓｅ的含量，是一种精确、灵敏、快速的分析方法，可供科研人员和临床医生参考。     

氢化物发生－缝管原子捕集－原子吸收法测定钢铁和地质试样中的砷

介绍简易的氢化物发生原子吸收测砷的方法。喷雾器负压将ＫＢＨ_４吸入反应器，并将生成的ＡｓＨ_３吸入乙炔－空气焰原子化。石英缝管使灵敏度提高３．５倍。方法的检测限（３σ）为１．８ｎｇ／ｍＬ（５ｍＬ试样）。２０ｎｇ／ｍＬＡｓ（Ⅲ）标准液１０次测定的ＲＳＤ为３．８％。本法成功地应用于钢铁和地质标样中微量砷的测定。     

海水中铜锌铅镉的萃取-反萃取法同时提取-原子吸收光谱法测定

采用萃取-反萃取法同时提取出海水中Cu、Zn、Pb、Cd,Cu、Pb、Cd石墨炉法测定,Zn用火焰法测定.对样品的前处理方法和最佳仪器条件进行了研究,并通过加标实验验证了方法的可靠性.结果表明:萃取-反萃取法能完全满足海水中Cu、Zn、Pb、Cd的前处理要求,可节省一半前处理时间,有溶液稳定、环保、节省试剂等优点.     

原子吸收和原子发射光谱法测定工业废水中总铬方法比对

为了探讨原子吸收光谱法和原子发射光谱法测定工业废水中的总铬分析方法的异同,本文分别采用两种方法对工业废水中的总铬进行对比分析,对样品前处理方法、标准曲线、方法检出限、准确度、精密度、干扰及消除等进行比较,并对两种方法的测定结果进行t检验。结果表明,两种方法具有良好的一致性。相对来说,原子发射光谱法各方面指标要优于原子吸收光谱法。     

Determination of Lead in Whole Blood and Urine Using Zeeman Effect Flameless Atomic Absorption Spectroscopy

Abstract

Lead is the most frequently quantitated toxic metal in biological matrices. We describe methodologies for lead determinations in whole blood and urine using Zeeman effect flameless atomic absorption spectroscopy. The whole blood determination requires a simple aqueous 1:10 dilution while the urine lead methodology utilizes a twofold dilution with 5% nitric acid. Within-run relative standard deviations (RSD) for the whole blood determination are approximately 4. 9%, while urine lead within-run PSD's are approximately 6.7%. Detection limits for both the whole blood lead determination and the urine lead determination are 3 ppb. Linearity for both assays is to 200 ppb in the diluted specimens.     

石墨炉原子吸收法测定人体血浆和尿中锗

研究了口服有机锗（Ｇｅ－１３２）后人体血浆及尿中锗的测定方法。以５％三氯乙酸溶液沉淀血蛋白，离心分离后，取上清液测定。以钯和硝酸镍混合溶液做基体改进剂，提高灰化温度至１４００℃，消除了样品中大量基体对测定锗的干扰。方法特征量为３１ｐｇ，检出限为２８ｐｇ（３σ），样品加标准回收率为：血浆９１．４％～９７．０％，尿９７．２％～１０５％。