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ASTM D4193-08(2013)e1
Standard Test Method for Thiocyanate in Water (Includes all amendments And changes 1/23/2020).
Automaticky přeložený název:
Standardní zkušební metoda pro thiokyanátem ve vodě
NORMA vydána dne 1.6.2013
Informace o normě:
Označení normy: ASTM D4193-08(2013)e1
Poznámka: NEPLATNÁ
Datum vydání normy: 1.6.2013
Kód zboží: NS-26383
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D4193-08(2013)e1 :
Keywords:
cyanide, cyanogen chloride, ferric ions, macroreticular resin (XAD-8), spectrophotometer, thiocyanate, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Doplňující informace
| Significance and Use | ||||||||||||||||||||||||||||||||
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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. |
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| 1. Scope | ||||||||||||||||||||||||||||||||
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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.
Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Water
Analysis Standard Practice for Describing and
Measuring Performance of Ultraviolet and Visible
Spectrophotometers Standard Practice for Analysis of Metals,
Ores, and Related Materials by Spectrophotometry (Includes all
amendments and changes 6/29/2022). Standard Practice for Sampling,
Preservation and Mitigating Interferences in Water Samples for
Analysis of Cyanide (Includes all amendments and changes
5/13/2022). Standard Test Method for Free Cyanide and
Aquatic Free Cyanide with Flow Injection Analysis (FIA) Utilizing
Gas Diffusion Separation and Amperometric Detection Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Organic
Constituents (Withdrawn 2002) Standard Guide for Spiking Organics into
Aqueous Samples Standard Guide for Equipment for Sampling
Water and Steam in Closed Conduits (Withdrawn 2003) Standard Practice for Estimation of
Holding Time for Water Samples Containing Organic and Inorganic
Constituents Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Specification for Reagent
Water Standard Test Methods for Cyanides in
Water Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
Water Standard Practices for Sampling Water
from Flowing Process Streams Standard Guide for Management Systems in
Laboratories Engaged in Analysis of Water Standard Practice for Intralaboratory
Quality Control Procedures and a Discussion on Reporting Low-Level
Data (Withdrawn 2002) |
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