AOAC Official Method 940.17 Carbon Dioxide in Beer Manometric Method
First Action 1940
Final Action
A. Apparatus
(a) Piercing apparatus—(1) For bottles.—Consists of gas-tight packing box and fastening for adjustment over container, and hollow spike connected to accurate pressure gage and outlet valve. Check gages frequently. (2) For cans.—Consists of metal frame in which can is placed. Top of apparatus, which is pressed or screwed down and locked over can top, contains hollow spike surrounded by compressible rubber sealing plug; hollow spike leads to accurate pressure gage and outlet valve. (One apparatus, adjustable for use with both bottles and cans, may be used.)
(Notes: Piercing devices can be obtained from Zahm and Nagel Co., 210 Vermont St, Holland, NY 14080, USA.)
For suitable manometer for calibrating gages, see Gray and Stone,Ind. Eng. Chem., Anal. Ed., 10, 15 (1938). Dead weight testing unit suitable for calibration can be obtained from AMETEK/Mansfield & Green Division, 8600 Somerset Dr., Largo, FL 34643, USA; Dresser Industries, Inc., 250 E Main St, Stratford, CT 06497, USA, and other companies.
