直接测汞仪计量校准方法探讨

摘要

The principle and structure of direct mercury analyzer were introduced. The calibration method and the main calibration items such as linear error, correlation coefficient, detection limit and the repeatability of measurement, as well as the technical parameters were discussed. The technical parameters were as follows: the linearity error was within±10%, the linear correlation coefficient was not less than 0.997, the detection limit was not more than 0.02 ng, the repeatability (RSD) was less than 5% (n=7). The attentions in direct mercury analyzer calibration were put forward.%介绍了直接测汞仪的原理和结构，对其校准方法和主要计量校准项目如线性误差与相关系数、检出限、测量重复性，以及具体技术指标进行了探讨。技术指标如下：线性误差在±10%之内，线性相关系数r≥0.997，检出限不大于0.02 ng，重复性不超过5%(n=7)。提出了直接测汞仪校准过程中应注意的事项。