Abstract

The effect produced by the Triton X-100 concentration and ultrasonic treatment time on the value of an analytical signal during the atomic absorption and inductively coupled plasma atomic emission determination of analytes in strata water was studied. When Triton X-100 was used, the sensitivity of atomic absorption analysis grew by 1.5 times for manganese, 1.6 times for zinc, and 1.8 times for cadmium. As a result of atomic absorption analysis with the use of a surfactant, atomization completeness was attained. Using the methods of atomic absorption and inductively coupled plasma atomic emission, the content of manganese, zinc, and cadmium in strata water was determined. The precision of analysis results was improved by using acetyl acetonates of metals, as the reference samples must be similar to the analyzed samples in their chemical composition. Using the standard addition method at a varied water sample volume, the systematic error was shown to be negligible at a relative standard deviation s_r of less than 0.03. The consistency of results obtained by two independent methods was estimated by F- and t-criteria. The results were shown to have a uniform variance by the F-cirterion, and the average results could be summarized by the t-criterion. The developed method excluded the use of toxic and expensive reagents to be competitive by the atomic absorption detection limits: c_min for Cd, Mn, and Zn was found to be 0.002 µg/mL.

中文翻译：

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地层水中 Zn、Mn 和 Cd 的测定

摘要

研究了原子吸收和电感耦合等离子体原子发射测定地层水中分析物时，Triton X-100浓度和超声处理时间对分析信号值的影响。当使用 Triton X-100 时，原子吸收分析的灵敏度对锰提高了 1.5 倍，对锌提高了 1.6 倍，对镉提高了 1.8 倍。作为使用表面活性剂的原子吸收分析的结果，达到了雾化完全性。采用原子吸收法和电感耦合等离子体原子发射法测定地层水中锰、锌、镉的含量。使用金属的乙酰丙酮化物提高了分析结果的精度，因为参考样品的化学成分必须与分析样品相似。s _r小于 0.03。通过F - 和t - 标准估计两种独立方法获得的结果的一致性。F-标准表明结果具有均匀的方差，平均结果可以用t-标准概括。所开发的方法排除了使用有毒和昂贵的试剂，从而在原子吸收检测限方面具有竞争力：发现 Cd、Mn 和 Zn 的c _min为 0.002 µg/mL。