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ASTM E 1787 Document Information:
Title
Standard Test Method for Anions in Caustic Soda and Caustic Potash (Sodium Hydroxide and Potassium Hydroxide) by Ion Chromatography
ASTM International
Publication Date:
Apr 1, 2008
Scope:
This test method covers the determination of anionic impurities
in 50 % caustic soda (sodium hydroxide) and 50 % caustic potash
(potassium hydroxide) solutions using ion chromatography (IC).
Anions that can be determined at concentrations of approximately
0.1–1000 ug/g (ppm) include: bromide, chlorate, chloride, fluoride,
nitrate, phosphate, and sulfate.
By varying the sample size, this test method can be used for
anhydrous caustic soda and caustic potash products, as well as
other concentrations of liquid products.
This test method is not intended to be used to quantify chloride
in caustic soda where the sodium chloride concentration is
approximately 1 %. For the most accurate determinations, it is
recommended that high concentrations of chloride be analyzed using
a potentiometric titration procedure, such as the one described in
Test Methods E 291.
The values stated in SI units are to be regarded as standard.
The values given in parentheses are for information only.
Review the current appropriate Material Safety Data Sheets
(MSDS) for detailed information concerning toxicity, first aid
procedures, and safety precautions.
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. Specific hazards statements are
given in Section 8.
*A Summary of Changes section appears at the end of this
standard.
Keywords:
- vbromide
- caustic potash
- caustic soda
- chlorate
- chloride
- chromatography
- fluoride
- ion chromatography
- nitrate
- phosphate
- potassium hydroxide
- sodium hydroxide
- sulfate
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