Studies in the analytical chemistry of drugs. The determination of total alkaloids in nux vomica preparations*1*Presented before the Washington meeting of the American Chemical Society.1Contribution from the Drug Control Laboratory, Bureau of Chemistry, U. S. Department of Agriculture.

1924 ◽  
Vol 13 (8) ◽  
pp. 691-696
Author(s):  
Samuel Palkin ◽  
H.R. Watkins
Keyword(s):  
Analytical Chemistry ◽  
American Chemical Society ◽  
Chemical Society ◽  
Drug Control ◽  
Control Laboratory ◽  
Department Of Agriculture ◽  
Total Alkaloids

The American Chemical Society Exams Institute Undergraduate Chemistry Anchoring Concepts Content Map V: Analytical Chemistry

2020 ◽  
Vol 97 (6) ◽  
pp. 1530-1535 ◽  
Author(s):  
Thomas A. Holme ◽  
Christopher Bauer ◽  
Jaclyn M. Trate ◽  
Jessica J. Reed ◽  
Jeffrey R. Raker ◽  
...  
Keyword(s):  
Analytical Chemistry ◽  
American Chemical Society ◽  
Chemical Society ◽  
Undergraduate Chemistry

A Short Note on the Tensile Testing of Rubber

1932 ◽  
Vol 5 (3) ◽  
pp. 351-355 ◽  
Author(s):  
M. Jones
Keyword(s):  
Tensile Strength ◽  
Tensile Testing ◽  
Short Note ◽  
American Chemical Society ◽  
Chemical Society ◽  
Ring Test ◽  
Stress Strain ◽  
Test Pieces ◽  
The One

Abstract The evaluation of rubber has centered largely around stress-strain phenomena, and the property of tensile strength is probably the one which has the most general application throughout the industry. Rubber exhibits stress-strain properties quite different from the majority of substances, and peculiar difficulties are introduced during the determination of tensile strength. Although tentative standards have recently been issued by the American Chemical Society, there is no evidence that these are being strictly adhered to, and there is still need for a more rigid standardization of tensile-testing methods. There are essentially two methods of tensile-testing: (1) Using dumb-bell test-pieces with a Bureau of Standards machine, or a Scott type of machine; and (2) Using ring test-pieces with a Schopper type of machine. It is generally supposed that higher tensile results are obtained by the former method. Recently, occasion has occurred to make a comparison between both types and to study the effect of certain factors upon each method.

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