BRITISH STANDARD BS 5711-12:
1979
CONFIRMED
AUGUST 1994
Methods of
Sampling and test for
glycerol —
Part 12: Determination of chloride
content
NOTE It is recommended that this Part of BS 5711 be read in conjunction with the
general information given in BS 5711-0 “General introduction”, issued separately.
UDC 661.188.1:547.426.1:543.062:546.131
BS 5711-12:1979
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Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii,
pages 1 and 2, an inside back cover and a back cover.
This British Standard, having This standard has been updated (see copyright date) and may have had
been prepared under the amendments incorporated. This will be indicated in the amendment table on
direction of the Chemicals the inside front cover.
Standards Committee, was
published under the
authority of the Executive
Board and comes
into effect on Amendments issued since publication
30 November 1979
Amd. No. Date of issue Comments
© BSI 12-1999
The following BSI references
relate to the work on this
standard:
Committee reference CIC/6
Draft for comment 75/73579 DC
ISBN 0 580 10993 3
BS 5711-12:1979
Contents
Page
1 Scope and field of application 1
2 References 1
3 Principle 1
4 Reagents 1
5 Apparatus 1
6 Sampling 1
7 Procedure 1
8 Calculation 1
9 Test report 1
Publications referred to Inside back cover
© BSI 12-1999 i
ii blank
BS 5711-12:1979
1 Scope and field of application 7 Procedure
This British Standard describes a titrimetric Weigh, to the nearest 0.1 g, about 50 g of the sample
method for the determination of the chloride content into a 500 ml conical flask, add
of technical and dynamite grade glycerols. approximately 200 ml of water and 5 drops of the
potassium chromate solution (4.2). Titrate with the
2 References silver nitrate solution (4.1) until the solution just
turns to a permanent reddish-pink colour.
The titles of the publications referred to in this
standard are listed on the inside back cover. NOTE It is advisable that all tests should be carried out in
duplicate.
3 Principle 8 Calculation
Titration, after dilution, of a test portion with silver Calculate the chloride content, expressed as
nitrate solution and potassium chromate as percentage by mass of sodium chloride (NaCl), from
indicator. the formula
4 Reagents V
0.058 ´ -----
m
The reagents used shall be of a recognized analytical
grade. Distilled water complying with the where
requirements of BS 3978 or water of at least equal V is the volume of the silver nitrate solution
purity shall be used. used to titrate the test portion (ml)
4.1 Silver nitrate, 0.01N standard volumetric m is the mass of the test portion (g).
solution.
4.2 Potassium chromate, 5 % (m/m) solution. 9 Test report
5 Apparatus The test report shall include the following
particulars:
Burette, 50 ml, complying with the requirements of a) a reference to this British Standard;
class A of BS 846.
b) the result and the method of expression used;
6 Sampling c) any unusual features noticed during the
determination;
Prepare the laboratory sample as described in
Part 2 of this British Standard. d) any operation not included in this
British Standard or regarded as optional.
© BSI 12-1999 1
2 blank
BS 5711-12:1979
Publications referred to
BS 846, Burettes and bulb burettes.
BS 3978, Water for laboratory use.
BS 5711, Methods of sampling and test for glycerol.
BS 5711-2, Methods of sampling.
© BSI 12-1999
BS 5711-12:
1979
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