This investigation describes that GPC was used to separate effectively 3, 6 -dichloro -pyridine-2-carboxylic acid, from3, 5,6-trichloro -4-cyano-pyridine -2 -carboxylic , 2-cyano- pyridine and tetrachloro -2- cyano -pyridine , the peak purity of 3, 6 -dichloro -phridine -2 -carboxylic acid was identified by " purity augle " theory.
This paper presents a high performance liquid chromatography (HPLC) method for analysis of mixtures of explosives.The method has successfully been applied to the following exploxives:RDX,HMX,TNT,2,4 DNT,BTF,Tetryl,TNB and CL-20.Analysis time was less than 12 minutes by using an isocratic HPLC mobile phase of methanol and water.For CL-20 the detection limit was 10ng.
Electronic spectroscopy of chemical analysis(ESCA)was used to study the surface composing of flu polymer F 2314 .The structure and composing of the copolymer was investigated according to each of the ClS spectra.Furthermore,the possible chain link mode was estimated.Comparing the spectra of undissolved part with F 2314 copolymer,there are some differences between the compose,but the chain link mode remains the same.The results of the experiment indicated that the increase of the proportion of CTFE in undissolved sample affected the solubility of F 2314 copolymer in different batches.
