The orimulsion sample was incinerated by programmed temperature rising method,and high flow rate dry air was used to remove the water. The problems of elements loss and bad repeatability induced by sudden boiling of solution were solved.
A temperature programmed capillary GC method was used to separate a-cyano-3-phenoxybenzylalcohol (1) and a-cyano-3-phenoxybenzyl acetate (2)using n-hexadecane as the internal standard.
This report introduced GC method with capillary column and FID detecter to analysis petroleum oils,using temperature program from 85℃ to 210℃ and tributyl phosphate as interal standard. Comparation with GC and sulphonating ,the results showed that the variation coeffcients were 0.075% and 4.53%,the standard deviation were 0.026 and 1.19, the recoveries were 98.0%~102.8% and 114.2%~134.4% respectively.
The Tilm made by polymer of phenylsilsesqoxane (polyphenylsiloxane), after cleaning, was dissolved in benzene and then coated on the diatomaceous supoprts. The coated support was heattreated under a stream of nitrogen at 400 ℃ for 12 hours. The obtained stationary phase showed a thermal stability up to a temperature of 280 ℃ without bleeding and has been used up to 290 ℃ with a little bleeding. A mixture of n-alkanes containing C_7 -C_(30) could be well separated with temperature programmed to 290 ℃ by the ...
Since the preliminary proposal of "free radical repair" via H-transferprocess was suggested, a series of ESR studies, such as by Ormerod and Alexander, Pul-lman and Milvy et al. have been performed to clarify the repair mechanism exerted bythe sulfhydryl compounds such as octyl mercaptan, cysteine. but only cysteamine wasstudied in detail in binary system containing DNA or dTMP and cysteamine. As forcysteine it was failed to be confirmed in binary system containing cysteine.HCl andDNA or dTMP. In our previo...
15 rare earth hippurate have been synthesized and characterized by IR spectra, UV reflectance speactra, TG and DTA. The results are that the plot of maximun absorption peaks λmax in UV reflectance spectra against atomic number Z reveals tetrad effect, the plot of the temperature of en-