元素分析仪测定土壤、沉积物样品碳氮含量的影响因素及数据校正

Effect Factor and Data Calculation of Carbon and Nitrogen Content of Soil and Sediment Determined by Element Analyzer

摘要: 使用元素分析仪进行土壤、沉积物样品碳、氮含量检测时,样品前处理过程(烘干和酸化)、包样质量以及参考标准品等因素均会对检测结果造成影响. 试验结果表明:酸化导致氮百分质量的测定结果降低2.6%~40.0%,碳百分质量的测定受包样质量的影响较大,使用的校正标准与被测样品越相似,校正结果越准确.

Abstract: The results determined by an element analyzer are affected by the pretreatment (drying, acidification), weight of sample and calculation standard. The present results suggested that acidification would decrease the nitrogen content 2.6%~40%, the determination of carbon is significantly affected by the sample weight, the results will be more accurate if calculated by the standard which is more similar with the samples.