ASTM D4165-06(2020)e1

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
´1
Designation: D4165 − 06 (Reapproved 2020)
Standard Test Method for
Cyanogen Chloride in Water
This standard is issued under the fixed designation D4165; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Warning notes were editorially updated throughout in January 2020.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This test method covers the determination of cyanogen
chloride in water. Cyanogen chloride is normally present only
2. Referenced Documents
at very low concentrations; it is a very labile and sparsely
soluble gaseous compound. Water samples may contain cya-
2.1 ASTM Standards:
nogen chloride after the chlorination of waste waters contain- D1129Terminology Relating to Water
ing cyanide or thiocyanate compounds.
D1193Specification for Reagent Water
D2036Test Methods for Cyanides in Water
1.2 Cyanogen chloride is unstable.Aquick test using a spot
D3370Practices for Sampling Water from Flowing Process
plate or comparator as soon as the sample is collected may be
Streams
the best test, reducing the loss of cyanogen chloride during the
D3856Guide for Management Systems in Laboratories
time lapse between sampling and analysis. (See Fig. 1 for a
Engaged in Analysis of Water
typical decay curve for cyanogen chloride in a solution.)
D4210Practice for Intralaboratory Quality Control Proce-
1.3 This test method has been used successfully with
dures and a Discussion on Reporting Low-Level Data
reagent water. The analyst is responsible for determining
(Withdrawn 2002)
whetherthetestmethodisapplicabletothewatermatrixbeing
D5789Practice for Writing Quality Control Specifications
tested. Reference is made to Test Method D of Test Methods
for Standard Test Methods for Organic Constituents
D2036 which is based on similar chemical reactions and has
(Withdrawn 2002)
been evaluated by collaborative testing in this matrix.
D5847Practice for Writing Quality Control Specifications
−
for Standard Test Methods for Water Analysis
1.4 The lower limit of detectability is 0.005 mg CN /L.
E60Practice for Analysis of Metals, Ores, and Related
1.5 The values stated in SI units are to be regarded as
Materials by Spectrophotometry
standard. No other units of measurement are included in this
E275PracticeforDescribingandMeasuringPerformanceof
standard.
Ultraviolet and Visible Spectrophotometers
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions:
priate safety, health, and environmental practices and deter-
3.1.1 For definitions of terms used in this standard, refer to
mine the applicability of regulatory limitations prior to use.
Terminology D1129.
Specifichazardstatementsaregivenin8.5and8.7andSection
9.
4. Summary of Test Method
1.7 This international standard was developed in accor-
dance with internationally recognized principles on standard- 4.1 The water sample is mixed with a pyridine-barbituric
ization established in the Decision on Principles for the acid solution and the color produced is measured with a
Development of International Standards, Guides and Recom- spectrophotometer.
1 2
This test method is under the jurisdiction ofASTM Committee D19 on Water For referenced ASTM standards, visit the ASTM website, www.astm.org, or
andisthedirectresponsibilityofSubcommitteeD19.06onMethodsforAnalysisfor contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Organic Substances in Water. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2020. Published January 2020. Originally the ASTM website.
approved in 1982. Last previous edition approved in 2012 as D4165–06 (2012). The last approved version of this historical standard is referenced on
DOI: 10.1520/D4165-06R20E01. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D4165 − 06 (2020)
where such specifications are available. Other grades may be
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
accuracy of the determination.
8.2 Purity of Water—Unless otherwise indicated, references
to water shall be understood to mean reagent water that meets
thepurityspecificationsofTypeIorTypeIIwaterpresentedin
Specification D1193.
8.3 Barbituric Acid.
8.4 Chloramine-T Solution (10 g/L)—Dissolve 1.0 g of the
white colored, water-soluble grade powder chloramine-T in
100 mL of water. Store in an amber bottle under refrigeration.
Prepare fresh weekly.
−
8.5 Cyanide Solution, Stock (1 mL = 250 µg CN )—
Dissolve 0.6258 g of potassium cyanide (KCN) in 40 mL of
sodium hydroxide solution (40 g/L). Dilute to 1 L with water.
Mix thoroughly; standardize with standard silver nitrate solu-
tion (see Section 8 of Test Methods D2036). (Warning—
Because KCN is highly toxic, avoid contact or inhalation. Do
not pipet by mouth (see Section 9).)
−
8.5.1 Cyanide Solution I, Standard (1 mL=25 µg CN )
—Diluteacalculatedvolume(approximately100mL)ofKCN
stock solution to 1 L with NaOH solution (1.6 g/L).
−
8.5.2 Cyanide Solution II, Standard(1mL=2.5µgCN )—
FIG. 1 Cyanogen Chloride Stability
Diluteexactly100mLofcyanideSolutionIto1LwithNaOH
solution (1.6 g/L).
8.5.3 Cyanide Solution III, Standard (1 mL=0.25 µg
−
CN )—Dilute exactly 100 mL of cyanide Solution II to 1 L
5. Significance and Use
withNaOHsolution(1.6g/L).Preparefreshsolutiondailyand
5.1 The presence of cyanogen chloride in chlorinated sani-
protect from light.
taryandindustrialeffluentsandthereforereceivingwatersisof
8.6 Phosphate Buffer—Dissolve 138 g of sodium dihydro-
concern because of its toxicity to aquatic life.
gen phosphate (NaH PO ·H O) in water and dilute to 1 L.
2 4 2
Refrigerate this solution.
5.2 This test method provides an analytical procedure for
measuring cyanogen chloride in water.
8.7 Pyridine. (Warning—Pyridine may cause irritation to
the skin and respiratory tract. Do not pipet by mouth (see
5.3 This test method is applicable for clean metal finishing
Section 9).)
and chlorinated sanitary and industrial effluents, and also can
8.8 Pyridine-Barbituric Acid Reagent—Place 15 g of barbi-
be used to establish process control of cyanide destruction by
turic acid in a 250-mL volumetric flask and add just enough
chlorination in waste water treatment facilities.
watertowashthesidesoftheflaskandwetthebarbituricacid.
Add 75 mL of pyridine and mix. Add 15 mL of hydrochloric
6. Interferences
acid (sp gr 1.19), mix, and cool to room temperature. Dilute to
6.1 Color and turbidity can interfere.
volume with water and mix until all of the barbituric acid is
dissolved. This solution is usable for about 6 months if stored
7. Apparatus
in a cold, dark place.
7.1 Spectrophotometer or Filter Photometer, suitable for
8.9 Sodium Hydroxide Solution (40 g/L)—Dissolve 40 g of
measurementintheregionof578nm,using1.0-cmabsorption
sodium hydroxide in water and dilute to 1 L with water.
cells. Filter photometers and photometric practices used in this
8.10 Sodium Hydroxide Solution(1.6g/L)—Dilute40mLof
testmethodshallconformtoPracticeE60.Spectrophotometers
NaOH (40 g/L) solution to 1 L with water.
shall conform to Practice E275.
8. Reagents
ACS Reagent Chemicals, Specifications and Procedures for Reagents and
Standard-Grade Reference Materials, American Chemical Society, Washington,
8.1 Purity of Reagents—Reagent grade chemicals shall be
DC. For suggestions on the testing of reagents not listed by theAmerican Chemical
used in all tests. Unless otherwise indicated, it is
...