采用标准加入法进行仪器定量分析,首要的前提条件之一,就是要求计算的外推过程必须控制在校准曲线的线性范围之内。然而,在头际工作中,总是会因为某些可知或不可知的因素导致校准曲线发生形状不同或程度不同的弯曲,进而给标准加入注的分析结果不可避免造成非线性误差。近年来曾有人提出在标准加入法中根据校准曲线不同的弯曲情况,运用与之相适应的数学模型进行非线性外推,虽然在其研究的范围内得到了较好的效果,但由于数学模型的局限性和校准曲线的复杂性,加之还必须附带微处理 One of the first preconditions for using a standard addition method for instrument quantification is that the computational extrapolation process must be controlled within the linear range of the calibration curve. However, in the work at the head-end, bending of the calibration curve is always caused by some unknown or unknown factors, so the analysis results of the standard injection will inevitably cause nonlinear errors. In recent years, it has been proposed in the standard accession method based on the calibration curve of different bending conditions, the use of adaptive mathematical models for non-linear extrapolation, although within the scope of its study has been better, but the mathematical model The limitations and the complexity of the calibration curve, combined with the need for micro-processing