ASTM D512-12
测定水中氯离子含量的标准试验方法
Standard Test Methods for Chloride Ion In Water
- 标准号
- ASTM D512-12
- 发布
- 2012年
- 发布单位
- 美国材料与试验协会
- 替代标准
- ASTM D512-23
- 当前最新
- ASTM D512-23
- 适用范围
Chloride ion is under regulation in waste water, and must, therefore, be measured accurately. It is highly detrimental to high-pressure boiler systems and to stainless steel, so monitoring is essential for prevention of damage. Chloride analysis is widely used as a tool for estimating the cycles of concentration, such as in cooling tower applications. Processing waters and pickling solutions used in the food processing industries also require dependable methods of analysis for chloride.
1.1 These test methods cover the determination of chloride ion in water, wastewater (Test Method C only), and brines. The following three test methods are included:
Sections Test Method A (Mercurimetric Titration) 7 to14 Test Method B (Silver Nitrate Titration) 15 to 21 Test Method C (Ion-Selective Electrode Method) 22 to 29 1.2 Test Methods A, B, and C were validated under Practice D2777 x2013; 77, and only Test Method B conforms also to Practice D2777 x2013; 86. Refer to Sections 14, 21, and 29 for further information.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. For a specific hazard statement, see 26.1.1.
1.5 A former colorimetric test method was discontinued. Refer to Appendix X1 for historical information.