ASTM D4193-08(2013)e1
Standard Test Method for Thiocyanate in Water

Standard No.
ASTM D4193-08(2013)e1
Release Date
2008
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM D4193-08(2020)e1
Latest
ASTM D4193-08(2020)e1
Scope

5.1 This test method is useful for analysis of many natural waters that contain thiocyanate from organic decomposition products and waste water discharges. Some industrial wastes, such as those from the metallurgical processing of gold ores, steel industry, petroleum refining, and coal gasification, may contain significant concentrations of thiocyanate. Thiocyanate per se is not recognized as a toxic chemical compound. However, when chlorinated, thiocyanate is converted to the highly toxic and volatile cyanogen chloride at high pH. Oxidation of thiocyanate may also release toxic hydrogen cyanide. The user of the method is advised to perform holding time studies in accordance with Practice D4841 whenever oxidants are present in the samples.

5.1.1 For information on the impact of cyanogens and cyanide compounds, see Appendix X1 of Test Method D2036.

1.1 This test method covers the quantitative colorimetric laboratory measurement of dissolved thiocyanate in water, waste water, and saline water in the range from 0.1 to 2.0 mg/L. For higher concentrations, use an aliquot from the diluted sample.

1.1.1 Validation—This test method was validated over the range of 0.07 to 1.42 mg/L. This test method was validated at nine laboratories at four levels. This test method may be valid for reporting results down to lower levels as validated in individual user laboratories.

1.1.2 Application—This test method has been validated in reagent water, Type II, in multiple laboratories and 7 natural waters, 1 laboratory effluent, 1 steel mill effluent, and 2 dechlorinated and treated sanitary effluents in single laboratories. It is the user's responsibility to assure the validity of the test method on any untested matrices.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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. For specific hazard statements, see Section 9.

ASTM D4193-08(2013)e1 Referenced Document

  • ASTM D1129 Standard Terminology Relating to Water
  • ASTM D1192 Standard Guide for Equipment for Sampling Water and Steam in Closed Conduits
  • ASTM D1193 Standard Specification for Reagent Water
  • ASTM D2036 Standard Test Methods for Cyanides in Water
  • ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
  • ASTM D3370 Standard Practices for Sampling Water from Closed Conduits
  • ASTM D3856 Standard Guide for Good Laboratory Practices in Laboratories Engaged in Sampling and Analysis of Water
  • ASTM D4210 Standard Practice for Intralaboratory Quality Control Procedures and a Discussion on Reporting Low-Level Data
  • ASTM D4841 Standard Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
  • ASTM D5788 Standard Guide for Spiking Organics into Aqueous Samples
  • ASTM D5789 Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Organic Constituents
  • ASTM D5847 Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
  • ASTM D7237 Standard Test Method for Free Cyanide and Aquatic Free Cyanide with Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection
  • ASTM D7365 Standard Practice for Sampling, Preservation and Mitigating Interferences in Water Samples for Analysis of Cyanide
  • ASTM E275 Standard Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near-Infrared Spectrophotometers
  • ASTM E60 Standard Practice for Analysis of Metals, Ores, and Related Materials by Molecular Absorption Spectrometry

ASTM D4193-08(2013)e1 history

Standard Test Method for Thiocyanate in Water


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