7. Reagents
7.1 Purity of Reagents - Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination.
7.2 Purity of Water - Unless otherwise indicated, references to water shall be understood to mean reagent water conforming to Specification D 1193, Type III.
7.3 Isopropyl Alcohol. Warning - Flammable.
7.4 Solvent Rinse Solution of the following composition by volume:
7.4.1 Isopropyl Alcohol, 90 %.
7.4.2 Distilled Water, 9 %.
7.4.3 Ammonium Hydroxide, 1 %. Warning - Poison. Causes burns. Vapor extremely irritating. Can be fatal if swallowed. Harmful if inhaled.
7.5 Mineral Spirits, reagent grade, minimum purity. (Warning - Combustible. Vapor harmful.)
