Standard Specifications for Laboratory Appartus |
Common terms and phrases
24 hours adequately resist chemical Aniline APPROX bear a permanent Bureau of Standards burette Calibration Capacity in ml Committee Corning normal cut and distinct Diameter of neck E. I. duPont enamel back equally suitable thermometric Etched Stem Glass etched stem type exceed one smallest Expansion Chamber Glass knob glazed entirely glazed inside GOOCH CRUCIBLES GRADUATED CYLINDERS graduated in 1/10 graduation marks Inside Diameter instrument must bear Jena 16 LESS letters clear cut limits of error M. C. A. PORCELAIN M. C. A. Specifications Manufacturer's name MANUFACTURING CHEMISTS marks shall extend maximum scale temperature meet Tests Mercury in glass name or Trade-mark Nitrogen NITROMETER outflow partial immersion Permanency of Range permanent identification number Plain front Pyrex respective sizes Scale grad small thermal hysteresis Solvay Process Specification Tests stopcock stoppers suitable thermometer tubing suitable thermometric glass Top Finish top of stem Trade-mark etched tubulature U. S. Bureau Volumetric Flasks words 76
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Page 43 - ASTM low-distillation thermometer shall conform to the following specifications: Type: Etched stem glass. Total length: 381 mm. Stem: Plain front, enamel back, suitable thermometer tubing; diameter, 6 to 7 mm. Bulb: Corning normal, Jena 16 III, or equally suitable thermometric glass; length, 10 to 15 mm.; diameter, 5 to 6
Page 16 - The capacity mark on transfer pipettes must not be more than 6 cm from the bulb. The outlet of any transfer pipette must be of such size that the free outflow shall last not more than one minute and not less than the following for the respective sizes: Capacity...
Page 43 - TOTAL LENGTH: 378 to 384 mm. (14.88 to 15.12 in.). STEM: Plain front, enamel back, suitable thermometer tubing. Diameter, 6.0 to 7.0 mm. (0.24 to 0.28 in.).
Page 44 - Pour," serial number and manufacturer's name or trade mark etched on the stem. Accuracy: Error at any point on scale shall...
Page 48 - C., for 24 hours, the accuracy shall be within the limit specified. Points to be tested for certification : 32°, 212°, 400°, 700° F., or o°, 100°, 200°, 370° C.
Page 24 - The relation of the height to the diameter must be such that the graduation marks are not less than 1 mm apart, and also that the graduated height is at least five times the inside diameter.
Page 11 - ... made for testing apparatus graduated for use at other temperatures. (c) Material and annealing. — The material should be of best quality of glass, transparent and free from striae, which adequately resists chemical action, and has small thermal hysteresis. All apparatus should be thoroughly annealed at 400° C. for 24 hours and allowed to cool slowly before being graduated. (d) Design and workmanship. — The cross section must be circular and the shape must permit of complete emptying and...
Page 8 - The parts on which graduations are placed must be cylindrical for at least 1 cm on each side of every mark, but elsewhere may be enlarged to secure the desired capacities in convenient lengths. "The graduations should be of uniform width, continuous and finely but distinctly etched, and must be perpendicular to the axis of the apparatus. All graduations must extend at least halfway around, and on subdivided apparatus every tenth mark, and on undivided apparatus all marks must extend completely around...
Page 16 - ... transfer pipettes" by the Bureau. The suction tube of each transfer pipette must be at least 16 cm. long, and the delivery tube must not be less than 3 cm. nor more than 25 cm. long. The inside diameter of any transfer pipette at the capacity mark must not be less than 2 mm. and must not exceed the following limits: Capacity of pipettes (in...
Page 44 - F. for 24 hours, the accuracy shall be within the limit specified. CASE: The thermometer shall be supplied in a suitable case on which shall appear the marking: "ASTM High Distillation, 0 to 400° C.