ASTM D512-10 - 15.9.2010
 
Significance and Use

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. 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:

 
2. Referenced Documents

D5810-96(2026)

Standard Guide for Spiking into Aqueous Samples

D5847-22

Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis

D1129-24

Standard Terminology Relating to Water

D1066-18(2025)

Standard Practice for Sampling Steam

E200-23

Standard Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis

D1193-24

Standard Specification for Reagent Water

D2777-21

Standard Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water

D3370-25

Standard Practices for Sampling Water from Flowing Process Streams

D4127-18a(2026)

Standard Terminology Used with Ion-Selective Electrodes (Includes all amendments and changes 6/1/2026).