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ASTM International - ASTM D7126-06

Standard Test Method for On-Line Colorimetric Measurement of Silica

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Organization: ASTM International
Publication Date: 1 March 2006
Status: inactive
Page Count: 3
ICS Code (Examination of water for chemical substances): 13.060.50
significance And Use:

Silicon (Si), a metalloid, is the second most abundant element in the earth's crust. Various forms of silica (silicon dioxide SiO2) are found in quartz, sand and rocks. The degradation... View More

scope:

1.1 This test method covers the on-line determination of soluble silica in water by colorimetric analysis using the molybdenum blue method, also known as the heteropoly blue method.

1.2 This test method is applicable for silica determination in water with silica concentrations within 0.5 - 5000 ppb (g/L).

1.3 This test method covers the determination of soluble silica SiO2 (silicon dioxide) or silicates in water. Soluble silica compounds are considered molybdate reactive silica. This test method does not cover the determination of colloidal or polymeric silica, which is considered non-molybdate reactive silica.

1.4 This test method does not cover the laboratory or grab sample measurement of silica in water. Refer to Test Method D 859.

1.5 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.

Document History

July 15, 2015
Standard Test Method for On-Line Colorimetric Measurement of Silica
1.1 This test method covers the on-line determination of soluble silica in water by colorimetric analysis using the molybdenum blue method, also known as the heteropoly blue method. 1.2 This test...
December 1, 2010
Standard Test Method for On-Line Colorimetric Measurement of Silica
1.1 This test method covers the on-line determination of soluble silica in water by colorimetric analysis using the molybdenum blue method, also known as the heteropoly blue method. 1.2 This test...
ASTM D7126-06
March 1, 2006
Standard Test Method for On-Line Colorimetric Measurement of Silica
Silicon (Si), a metalloid, is the second most abundant element in the earth’s crust. Various forms of silica (silicon dioxide SiO2) are found in quartz, sand and rocks. The degradation of these rocks...
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