Evaluación de métodos cualitativos de higiene inversa para control de riesgo químico por exposición

Abstract

Abstract: Qualitative models: COSHH ESSENTIAL and CHEMICAL CONTROL TOOLKIT for chemical risk control based on control banding were evaluated using three measurements of exposition to chemical compounds hydrogen chloride, nitric acid, and acetic acid at the CESEMIN laboratory of the University of Cuenca. A control technology had already been stablished regarding exhaust hoods. Both applied methodologies place the three components within the C-danger group and protection level 2, for which, engineering control measurements are required consisting on general and localized ventilation to avoid chemical risk. The quantitative measurements of the chemical concentration on the workspace proved to be below the permissible limits with values of 1.36, 0.41 and 2.05 ppm for CH3COOH, HNO3 and HCl respectively, without the suggested technology for chemical risk control; while, the chemical concentrations on the workspace with control techniques (exhaust hood), decay to undetectable limits for HNO3 and CH3COOH, and to 0.51 ppm for HCl. The findings state that the suggested control measurements from qualitative methods work reasonably well for the studied products, proposing that the methods help to significantly control the risk of exposure