ASTM-E538 › Historical Revision Information
Standard Test Method for Mercury in Caustic Soda (Sodium Hydroxide) and Caustic Potash (Potassium Hydroxide)
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Scope
1.1 These test methods cover the routine determination of mercury in caustic soda and caustic potash liquors and anhydrous caustic soda in the solid, flake, ground, and bead form by the flameless atomic absorption method.
1.2 Two test methods are described as follows: Test Method A employs a direct analysis of the sample using an alkaline reducing agent with a lower limit of detection of 0.1 ppb (ng/g). Test Method A was developed using caustic soda and caustic potash. Test Method B requires a preliminary neutralization of the sample followed by a permanganate oxidation before it can be analyzed by an acidic reducing agent with a lower limit of detection of this test method of 0.01 ppm (g/g). Test Method B was developed using caustic soda.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 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 7 and 17.
1.5 Review the current material safety data sheets (MSDS) for detailed information concerning toxicity, first-aid procedures, and safety precautions.
Significance and Use
Mercury is a toxic material and is also deleterious if present in caustic soda and caustic potash used in certain manufacturing processes. It must therefore be controlled as a possible pollutant. These test methods provide a procedure for measuring mercury in liquid and solid caustic soda and caustic potash.
Keywords
caustic potash; caustic soda; flameless atomic absorption; mercury; potassium hydroxide; sodium hydroxide; ICS Number Code 71.040.40 (Chemical analysis)
To find similar documents by ASTM Volume:
06.04 (Paint -- Solvents; Aromatic Hydrocarbons)
To find similar documents by classification:
71.040.40 (Chemical analysis Including analysis of gases and surface chemical analysis)
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Document Number
ASTM-E538-98(2003)e1
Revision Level
1998 R03(E1) EDITION
Status
Superseded
Modification Type
Reapproval with Ed Change
Publication Date
May 1, 2003
Document Type
Test Method
Page Count
6 pages
Committee Number
E15.01