No abstract

1947 651 by the general method, as well as optional procedures for samples of special composition, are given.A simple test for inhibition and sensitivity eliminates any chance of false conclusions. ACKNOWLEDGMENTThis study was conducted under the general direction of S. R. Zimmerley, chief, Salt Lake City Division, Metallurgical Branch, Bureau of Mines, and E. V. Potter, in charge of the Analytical and Testing Section.The authors wish to acknowledge the assistance of their associates who have helped in carrying out these experiments. They are particularly indebted to S. F. Ravitz for assistance in preparing the manuscript and offering suggestions, and to Howard Tribe for preparing the photographs.

No abstract

A simplified method has been developed for the quantitative determination of aldicarb and its oxidation products, the sulfoxide and sulfone, in oranges, potatoes, carrots, corn, green beans, and silage. The method involves quantitative extraction from plant matrix, separation of aldicarb, the sulfoxide, and the sulfone on a liquid chromatographic column, oxidation to the sulfone, and GLC determination of the sulfone, using a sulfur mode-flame photometric detector. This method has a limit of detection of 0.005 ppm, using a 150 g sample for analysis. Recovery studies were run on a number of crops and silage. Samples of potatoes from Tern ik-trea ted plots were also analyzed.

Phytopathology Soc. 20, 21 (abstract) (1952).(83) Ríes, S. K., "Studies on the Selective Mechanism of Chloro-IPC (Isopropyl '-3-Chlorophenylcarbamate),"