Combustion Techniques for Determination of Residues of Highly Chlorinated Pesticides by Total Chlorine Analysis

Insecticide Residue Analysis, Sodium Reduction Technique for Microdetermination of Chlorine in Organic Insecticides

“…The sensitivity of titrating in this solution was found to be in the vicinity of 0.2y of chlorine per ml. (2). The titrating solution, described above, exhibits approximately the same sensitivity.…”

Residue Analysis, Direct Potentiometric Method for Chloride Ion Applied to Residues of Chlorinated Insecticides

“…Standard percentage deviations for various ranges of chloride concentrations are collated in Table V. As a practical check of the method, several pairs of typical control samples were processed (6), and burned in the usual manner (1,6,7). One sample from each of these pairs was fortified with a known amount of a chlorinecontaining insecticide (purified dieldrin, 56% chlorine).…”

“…In the model GS instrument the zero adjusting potentiometer had been replaced by a 10-turn helical potentiometer equipped with a multi-turn indicating dial knob of 1000 divisions. A differential voltage of 100 millivolts could be read with an average reading error of 1 4 division (= 0.025 mv.) on the helical potentiometer.…”

Pesticide Residues, Determination of Organic Chlorides and Residues from Chlorinated Pesticides by Combustion Analysis

“…The sample is introduced in a dropwise manner by careful adjustment of the sample delivery stopcock. Materials vary greatly in the rates at which they can be burned, but in general 1 When the sample level has fallen to the delivery stopcock, the funnel or buret is rinsed with a small amount of chloridefree solvent, such as isopropyl alcohol, and the rinsings are burned. The last few drops of sample remaining in the delivery tip may be burned by allowing them to be carefully drawn in by the partial vacuum in the system.…”