ASTM D512 – Standard Test Methods for Chloride Ion In Water
Description:
Significance and Use
4.1 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.
Scope
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 – 77, and only Test Method B conforms also to Practice D2777 – 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.
ASTM D5116