ASTM-D7126 Standard Test Method for On-Line Colorimetric Measurement of Silica

ASTM-D7126 - 2015 EDITION - CURRENT
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Standard Test Method for On-Line Colorimetric Measurement of Silica
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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 (μg/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 D859.

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 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.

Keywords

colorimetric; on-line; process measurement; silica;; ICS Number Code 13.060.50 (Examination of water for chemical substances)

To find similar documents by ASTM Volume:

11.01 (Water (I))

To find similar documents by classification:

13.060.50 (Examination of water for chemical substances)

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Document Number

ASTM-D7126-15

Revision Level

2015 EDITION

Status

Current

Modification Type

Revision

Publication Date

Aug. 1, 2015

Document Type

Test Method

Page Count

3 pages

Committee Number

D19.03