ICP-AES检测玩具涂层中重金属迁移量的耐用性分析

Ruggedness Analysis of Migration of Heavy Metal in Toy Coating by ICP-AES

采用电感耦合等离子体发射光谱法(ICP-AES法)检测玩具涂层中铅(Pb)的迁移含量,该文对该分析方法的耐用性进行分析,考察了不同源的标准溶液、静置时间、检测波长、模拟液的pH值、是否采用离心分离操作、震荡器转速和检测时间间隔,共计七个微小因素对最终检测结果的影响程度。结果表明,标准溶液的源和是否采用离心分离操作对检测结果的影响可以忽略;检测时间间隔、模拟液的pH值和检测波长对最终结果的影响很大,过程中需严格控制;静置时间、震荡器转速对检测结果也有一定的影响,测试过程中此因素需按照标准要求进行。依据耐用性分析结果,对检测结果有影响的因素须在标准操作程序(SOP)中进行详细规定。

Migration of Pb in toy coating is determined by ICP-AES.The ruggedness of the method is analyzed by studying the influence of tiny factors including the source of standard solution,stewing time,measure wavelength,the pH of simulated liquid,centrifugal separation,oscillator speed and measuring interval.The results show that,the source of standard solution and the centrifuge separation operation on the test results can be ignored,but the measuring interval,the pH of the simulated liquid and the detection wavelength have a great influence on the final result.Stewing time and oscillator speed also have some influence on the test results.The factors shall be conducted according to the standard requirements when testing.According to the results of ruggedness,the factors affecting the test results must be specified in the SOP.