The Repeatability and Reproducibility of a New Pretreatment of Trace Arsenic in Soil

Three experiments were carried out to examine the repeatability of a new pretreatment of arsenic in soil at Mar.28,Mar.31,and Apr.4,respectively.The results showed a good repeatability and reproducibility with measured value on the same sample of 8.14×10-6 and 8.60×10-6、 8.04×10-6 and 8.68×10-6,8.20×10-6 and 8.21×10-6,respectively.The rates of recovery of the three experiments which were 104%,99.1% and 104%,respectively and the measured value of standard which were 11.2×10-6 and 10.9×10-6,10.8×10-6 and 11.0×10-6,11.5×10-6 and 11.0×10-6 showed a good repeatability and reproducibility of this method.And the curve in the three experiments showed a good reproducibility with a little slope and intercept.