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Scope

1.1 This test method is used for the determination of free formaldehyde (HCHO) in emulsion polymers without upsetting existing formaldehyde equilibria. The procedure has been evaluated using acrylic, acrylonitrile-butadiene, carboxylated styrene-butadiene and polyvinyl acetate emulsion polymers. This test method may also be applicable for emulsion polymers of other compositions. The established working range of this test method is from 0.05 to 15 ppm formaldehyde. Emulsion polymers must be diluted to meet the working range.

1.2 This test method minimizes changes in free formaldehyde concentration that can result from changes in the physical or chemical properties of an emulsion polymer.

1.3 There are no known limitations to this test method when used in the manner described. The emulsion polymer test specimen must be prepared with a diluent that has a pH similar to that of the emulsion. Use of an inappropriate pH may upset formaldehyde equilibria and result in incorrect formaldehyde levels.

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.

Keywords

nt meters; EDM (electronic distance measurement); Electronic positioning system (EPS); Global positioning system (GPS); Horizontal positioning; Line of position (LOP); Manual measurement; Optical measurement; Positioning distances; Pulsed wave system; Range-range tracking; Sextant; Shore marks; Stadia measurements; Surface water; Tagline positioning techniques; Taut cable method; Tethered piano-wire method; Total-station survey systems; Transit intersection; Triangulation/intersection positioning; Zenith angles; measuring horizontal positioning;emduring surface water depth; measurement, selecting procedures, guide,;Order Form; ICS Number Code 71.040.50 (Physicochemical methods of analysis)

To find similar documents by ASTM Volume:

06.03 (Paint -- Pigments, Drying Oils, Polymers, Resins, Naval Stores, Cellulosic Esters, and Ink Vehicles)

To find similar documents by classification:

71.040.50 (Physicochemical methods of analysis Including spectrophotometric and chromatographic analysis)

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