Potassium bromide pellets, micro

Figure 2. Equipment useful in preparing micro potassium bromide pellets...

Figure 7. Infrared spectra of Abate mosquito larvicide by multiple in-ternal reflectance and micro potassium bromide pellet...

Figure 7 shows the spectra obtained from 4.9 /xg of Abate mosquito larvicide, using both the micromultiple internal reflectance and micro potassium bromide pellet techniques. The technique of Curry et al (18), dispensing the solution of the insecticide onto the potassium bromide... 

Cyclic nitramines such as RDX or cyclotetra-methylenetetranitramine (HMX) are widely used in military composites such as Composition B (TNT and RDX) and Composition C-4 (US) or PE-4 (British) and in commercial blasting explosives such as Semtex (a Czech-made mining explosive). HMX is present as a by-product in RDX made by the Bach-mann process and has applications in explosives to be used in high-temperature environments. Chemical tests for RDX include the J-Acid and thymol tests. A number of TLC systems for RDX and HMX have been reported. With adequate sample, IR identification of the pure material in a micro-potassium bromide pellet is simple. If a diamond anvil sample holder or microscope attachment is available, excellent spectra of pure samples of milligram size or even of single crystals are easily obtained. When HMX is observed in RDX-based explosives, its concentration may suggest the national origin of the explosive. 

Separated by Gas Chromatography, using a Potassium Bromide Micro-pellet Technique, Z. Anal, Chem. (1969) 246, 294-297. 

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