| pubmed-article:2741501 | pubmed:abstractText | Working up great test series to determine chloroform-extractive substances and tensides, increased trichlormethane concentrations can appear in the laboratory air-inspite of realization of numerous precautionary measures. As a rule the MAKD rate will be exceeded than. Various precautions failed to fulfill their purpose so that the solvent trichlormethane had been replaced by other solvents. Two demands mainly influenced on this replacement. The risk to health must be decreased so far that the work with solvents can be performed without any difficulties. The correlation between methods of determination must-on the other hand-be a reliable one. Trichlortrifluorethane is especially suited for the determination of extractive substances, dichlormethane for those of AAT (MBAS). The MAK rates can be observed with utilization of both the solvents. The reliable correlation of the concentration ascertained could be proved. | lld:pubmed |
