Ponsold B, Kath H
Staatliche Umweltinspektion beim Rat des Bezirkes Erfurt.
Z Gesamte Hyg. 1990 Oct;36(10):525-7.
The existing tetrachloroethylene was measured with the gas chromatographic method (FID detector), the spectro-photometric method (ICI Manual) based on the Fujiwava reaction, and using the gas detector (as approximation). The results obtained, however, do not differ in principle. Contaminated room air and leakages are the main sources of tetrachloroethylene at the dry cleaners and prevent the lowering of the traditional MEC value set at 100 mgm-3. Therefore the trend of diminishing the emission of exhaust air form machines can be neglected as factor in a general assessment. From the point of process engineering the problem of absorption of tetrachloroethylene in the indoor air with in the concentration range of 50 to 500 mgm-3 will be in the foreground. The excess of the MEC values is reflected by excess of the MIC values. It is difficult to keep to the MIC value within a distance of less than 50 m from the affected area of a dry cleaner.
采用气相色谱法（FID检测器）、基于富士波反应的分光光度法（ICI手册）以及使用气体探测器（近似测量）来测定现有的四氯乙烯。然而，所获得的结果在原则上并无差异。受污染的室内空气和泄漏是干洗店中四氯乙烯的主要来源，并且阻止了将传统的职业接触限值设定为100毫克/立方米的数值降低。因此，在总体评估中，可忽略机器排出空气中排放量减少的趋势这一因素。从过程工程的角度来看，室内空气中四氯乙烯浓度范围在50至500毫克/立方米时的吸收问题将成为重点。职业接触限值的超标由吸入浓度限值的超标反映出来。在距离干洗店受影响区域小于50米的范围内，很难保持在吸入浓度限值之内。
