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ASTM D1245-84(2003)

Historical Reaffirmation

Standard Practice for Examination of Water-Formed Deposits by Chemical Microscopy

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1.1 This practice describes a procedure for the examination of water-formed deposits by means of chemical microscopy. This practice may be used to complement other methods of examination of water-formed deposits as recommended in Practices D2331 or it may be used alone when no other instrumentation is available or when the sample size is very small.

1.2 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.


Chemical composition of water-formed deposits is a major indicator of proper or improper chemical treatment of process water, and is often an indicator of operational parameters as well, for example, temperature control. This practice allows for rapid determination of constituents present in these deposits, particularly those indications of improper water treatment, since they usually have very distinctive and easily recognized optical properties.

This practice, where applicable, eliminates the need for detailed chemical analysis, which is time-consuming, and which does not always reveal how cations and anions are mutually bound.

Qualitative use of this practice should be limited to those deposits whose control is generally known or predictable, based on treatment and feedwater mineral content, and whose constituents are crystalline, or in other ways optically or morphologically distinctive. If these criteria are not met, other techniques of analysis should be used, such as Practice D 2332 or Test Methods D 3483, or both.

Quantitative use of this practice should be limited to estimates only. For more precise quantitative results, other methods should be used (see 5.3).

SDO ASTM: ASTM International
Document Number D1245
Publication Date Oct. 26, 1984
Language en - English
Page Count 6
Revision Level 84(2003)
Supercedes
Committee D19.03
Publish Date Document Id Type View
June 1, 2017 D1245-17 Revision
May 1, 2011 D1245-11 Revision
May 1, 2008 D1245-08 Revision
Dec. 1, 2007 D1245-84R07 Reaffirmation
June 10, 1999 D1245-84R99 Reaffirmation
Oct. 26, 1984 D1245-84R03 Reaffirmation