Abstract
A simple and rapid on-line standard addition method for analysis of samples with high dissolved solids by ICP-OES is reported. The method involves on-line addition of standard solutions to the sample using a T-piece, prior to the sample introduction system. The standard addition method is commonly used in the analysis of samples with complex matrices. However, the conventional standard addition method is a tedious and time-consuming process. Therefore, in this study, on-line standard addition technique was offered to significantly decrease the analysis time and increase the simplicity of the standard addition method. The performance of the proposed method was tested by determination of rare earth elements in geological samples. This method showed a high level of accuracy in comparison with external calibration and internal standard addition methods.
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