Konishi Y, Yoshikawa M, Takata T, Kitamatsu Y, Ikeura T, Igarashi H, Fukushi T, Matsui M
Sangyo Igaku. 1984 Nov;26(6):470-6. doi: 10.1539/joh1959.26.470.
Direct measurement of the gases adsorbed on charcoal disk was examined by the gas-chromatograph with thermal desorption devices to improve the inadequacies of the common passive monitor. Since the most satisfactory values were obtained by a preliminary experiment with toluene vapor, the experiments were done with concentrations of 20, 40 and 80 ppm, respectively to get a linear relationship between the mean adsorption per piece and the concentration of toluene. Adsorption on the charcoal disk, and its extraction by carbon disulfide without degeneration, are the necessary conditions for the measurement of gas concentration. Methanol was selected as typical from among the gases for which the common passive monitor is inapplicable. The experiment on methanol was carried out in a manner similar to that done on toluene. In conclusion, our method was found to be satisfactory for the analysis of toluene, and, if the conditions are appropriate, for methanol.
为改进普通被动式监测仪的不足之处，利用带有热脱附装置的气相色谱仪对吸附在木炭盘上的气体进行了直接测量。由于用甲苯蒸汽进行的初步实验得到了最令人满意的值，因此分别以20、40和80 ppm的浓度进行实验，以获得每片木炭的平均吸附量与甲苯浓度之间的线性关系。木炭盘上的吸附以及用二硫化碳进行的无降解萃取是测量气体浓度的必要条件。甲醇是从普通被动式监测仪不适用的气体中挑选出来的典型气体。对甲醇的实验以与甲苯实验类似的方式进行。总之，我们的方法被发现对甲苯分析是令人满意的，并且如果条件合适，对甲醇分析也是如此。
