ASTM D5996-2005
用联机离子色谱法测量高纯度水中阴离子杂质的标准试验方法

Standard Test Method for Measuring Anionic Contaminants in High-Purity Water by On-Line Ion Chromatography

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标准号

ASTM D5996-2005

发布日期

2005年

实施日期

废止日期

无

中国标准分类号

Z16

国际标准分类号

71.040.50 (Physicochemical methods of analysis)

发布单位

US-ASTM

适用范围

1.1 This test method covers on-line analysis of high-purity water by the ion chromatography technique. This test method is applicable for measuring various anionic contaminants in high-purity water, typically in the range of 0.01 to 100 g/L. This test method is used to determine the concentration of acetate, formate, chloride, fluoride, phosphate, nitrate, and sulfate in a continuously flowing sample. The range of the test method is only as good as the reagent water available for preparing standards. At extremely low concentrations, 1.0 g/L, preparing standards is difficult, and extra care must be taken in their preparation. The sample may have to be conditioned from higher pressures and temperatures to conditions that are suitable for use by on-line instruments.

1.2 Online sample analysis of flowing streams does not lend itself to collaborative studies due to the nature of the sample and the possibility of contamination that may result from handling the sample as part of the collaborative study. Therefore this standard test method is not based on the results of a collaborative study but is intended to provide the best possible guidance for doing this type of analysis.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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