痕量分析中的分析空白

The analysis margin in trace analysis

在痕量分析中，样品的玷污是极易发生的，通过对国内外文献调查，比较系统地阐述了由玷污而引起的正空白（分析空白）对分析结果准确度及检测下限的影响；指出了分析空白产生的原因主要由环境、试剂、器。及分析者对样品的玷污所引起；提出了检测和扣除空白值的正确方法及评价痕量分析数据的准则。

The staining of sample can be made easily in trace analyses. After investigation literature both domestically and externally, the author firstly expounded rather systematically the analysis result precision and low detecting limit effected by positive margin(analysis margin)which are caused by staining;secondly pointed out that the reason of analysis margin is mainly the staining of sample caused by environment. reagent. ware and analyst himself; last proposed correct methods of detecting and deducting margin value and standards of evaluating trace analysis data.