Standard Methods of Chemical Analysis, Volume 2Van Nostrand., 1927 |
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Common terms and phrases
absorbed absorption acetic add 10 cc alcohol allowed alloys ammonium amount analysis antimony apparatus asbestos asphalts bath beaker bituminous material boiling bottle bromine bulb burette calculated carbon dioxide cement cent Chem chloride color combustion containing cool cubic cylinder Determination of Copper diameter dilute Dissolve distilled water Electrolytic Erlenmeyer flask ether evaporate excess explosion extract filter filtrate flask gases glass Gooch crucible grams HCl sp.gr heat HNO3 sp.gr hot water hydrochloric acid hydrogen hydroxide ignited inch insoluble iodine iron lead liquid manganese mercury metal methane method minutes mixture moisture NH4OH nitric acid nitrogen oxide oxygen paper percentage permanganate petroleum phosphorus pigment pipette platinum potassium potassium hydroxide precipitate reagent removed residue rubber saponification saturated sodium sodium hydroxide soluble SOLUTIONS REQUIRED specific gravity standard steel stopper sulphate sulphide sulphuric acid temperature thermometer titrate tube volume wash weighed wire zinc
Popular passages
Page 1299 - The consistency of a bituminous material expressed as the distance that a standard needle vertically penetrates a sample of the material under known conditions of loading, time and temperature. Where the conditions of test are not specifically mentioned, the load, time and temperature are understood to be 100 g., 5 seconds, and 25° C. (77° F.), respectively, and the units of penetration to indicate hundredths of a centimeter.
Page 1311 - Allow it. to remain in the water for 15 minutes before applying heat. Suspend the thermometer so that the bottom of the bulb is level with the bottom of the ring and within 0.635 cm. (j in.), but not touching, the ring.
Page 1207 - H about 10 cm. square. 40. Method. — In making the determination, 500 g. of cement with a measured quantity of water, shall be kneaded into a paste, as described in Section 37, and quickly formed into a ball with the hands, completing the operation by tossing it six times from one hand to the other, maintained about 6 in.
Page 1203 - The cement shall be stored in such a manner as to permit easy access for proper inspection and identification of each shipment, and in a suitable weather-tight building which will protect the cement from dampness.
Page 1203 - Packages varying more than 5 per cent from the specified weight may be rejected; and if the average weight of packages in any shipment, as shown by weighing 50 packages taken at random, is less than that specified, the entire shipment may be rejected.
Page 1116 - Fig. l) are made entirely of metal. The oil tube, A, is fitted at the top with an overflow cup, B, and the tube is surrounded by a bath. At the bottom of the oil tube is a small outlet tube through which the oil to be tested flows into a receiving flask. Fig. 2, whose capacity at 20° C. (68° F.) to a mark on its neck is 60, ±0.15, cc.
Page 1132 - The centrifuge tubes shall then be replaced in the centrifuge, again whirled for 10 minutes, and removed for reading the volume of water and sediment as before. This operation shall be repeated until the combined volume of water and sediment in each tube remains constant for three consecutive readings. In general, not more than four whirlings will be required.
Page 1206 - ... non-absorbent surface, thoroughly mixed dry if sand is used, and a crater formed in the center, into which the proper percentage of clean water shall be poured; the material on the outer edge shall be turned into the crater by the aid of a trowel. After an interval of...
Page 1226 - Avogadro hypothesis states that under the same conditions of temperature and pressure equal volumes of all gases contain the same number of molecules.
Page 1118 - ... permit the thermometer to shift in the oil. Any disturbance of the spongy network of wax crystals will lead to low and fictitious results.