ASTM C169 : 92(2000)

Standard Test Methods for Chemical Analysis of Soda-Lime and Borosilicate Glass

Standard Details

1.1 These test methods cover the quantitative chemical analysis of soda-lime and borosilicate glass compositions for both referee and routine analysis. This would be for the usual constituents present in glasses of the following types: (1) soda-lime silicate glass, (2) soda-lime fluoride opal glass, and (3) borosilicate glass. The following common oxides, when present in concentrations greater than indicated, are known to interfere with some of the determinations in this method: 2 % barium oxide (BaO), 0.2 % phosphorous pentoxide (P₂O₅), 0.05 % zinc oxide (ZnO), 0.05 % antimony oxide (Sb₂O₃), 0.05 % lead oxide (PbO).

1.2 The analytical procedures, divided into two general groups, those for referee analysis, and those for routine analysis, appear in the following order:

	Sections
Procedures for Referee Analysis:
Silica	10
BaO, R2O₂ (Al₂O₃ + P₂O₅), CaO, and MgO	11-15
Fe₂O₃, TiO₂, ZrO₂ by Photometry and Al₂O₃ by Complexio-metric Titration	16-22
Cr₂O₃ by Volumetric and Photometric Methods	23-25
MnO by the Periodate Oxidation Method	26-29
Na₂O by the Zinc Uranyl Acetate Method and K₂O by the Tetraphenylborate Method	30-33
SO₃ (Total Sulfur)	34 to 35
As₂O₃ by Volumetric Method	36-40
Procedures for Routine Analysis:
Silica by the Single Dehydration Method	42-44
Al₂O₃, CaO, and MgO by Complexiometric Titration, and BaO, Na₂O, and K₂O by Gravimetric Method	45-51
BaO, Al₂O₃, CaO, and MgO by Atomic Absorption; and Na₂O and K₂O by Flame Emission Spectroscopy	52-59
SO₃ (Total Sulfur)	60
B₂O₃	61 to 62
Fluorine by Pyrohydrolysis Separation and Specific Ion Electrode Measurement	63-66
P₂O₅ by the Molybdo-Vanadate Method	67-70
Colorimetric Determination of Ferrous Iron Using 1,10 Phenanthroline	71-76

1.3 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.