能力验证中总硬度标准品均匀性及稳定性分析

王舒婷<sup>1</sup>; 田渭花<sup>1*</sup>; 蔺凯<sup>2</sup>; 周弛<sup>1</sup>; 窦蓓蕾<sup>1</sup>; 杏艳<sup>1</sup>

引用本文:	王舒婷，田渭花，蔺凯，周弛，窦蓓蕾，杏艳.能力验证中总硬度标准品均匀性及稳定性分析[J].环境监控与预警,2016,8(5):42-44
	WANG Shu ting， TIAN Wei hua， LIN Kai， ZHOU Chi， DOU Bei lei ，XING Yan.Research of Homogeneity and Stability of Total Hardness Samples Used for Proficiency Testing[J].Environmental Monitoring and Forewarning,2016,8(5):42-44

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能力验证中总硬度标准品均匀性及稳定性分析
王舒婷，田渭花，蔺凯，周弛，窦蓓蕾，杏艳^1,2
1. 陕西省环境监测中心站，陕西西安 710054;2. 西安市水环境监测中心，陕西西安 710100

摘要:

研究用氯化钙和硫酸镁配制总硬度标准品的均匀性和稳定性，根据《能力验证样品均匀性和稳定性评价指南》（CNAS-GL03：2006），随机抽取样品进行检验。结果表明，4种浓度的样品在pH值＜2，室温25 ℃时，样品内和样品间均无显著性差异，样品均匀性合格，在一年内稳定性较好。

关键词: 总硬度标准样品均匀性稳定性

DOI：

分类号:X830.5

文献标识码:B

基金项目:

Research of Homogeneity and Stability of Total Hardness Samples Used for Proficiency Testing

WANG Shuting， TIAN Weihua， LIN Kai， ZHOU Chi， DOU Beilei ，XING Yan^1,2

1. Shanxi Province Environmental Monitoring Central Station，Xi^,an， Shanxi 710054，China;2. Xi^,an Water Environmental Monitoring Center， Xi^,an， Shanxi 710100， China

Abstract:

The homogeneity and stability of the standard samples which contain calcium chloride and magnesium sulfate for total hardness were investigated. Randomly selected samples were tested for homogeneity and stability according to the “Guidance on Evaluating the Homogeneity and Stability of Samples Used for Proficiency Testing” （CNAS-GL03：2006）. The results showed that four different concentrations of samples were stable and homogeneous in room temperature 25℃， pH<2 within a year， without significant difference in between the samples.

Key words: Total hardness Standard sample Homogeneity Stability