Abstract:In recent years, plasma emission spectrum has rapidly developed and widely used. It has excellent performance of many kinds of test elements, wide linear range and good stability . But strong matrix effects have caused great inconvenience. In this paper, stand addition regression epitaxy has been applied in spiked plasma spectrum. It can greatly reduce the dependence of the instrument to standard materials, reduce the matrix effects, enhance the reliability curve, improve data accuracy, and expand the scope of application of the instrument. It also can be used for reducing problems appeared in daily work, know the instrument performance deeply and improve the test level.