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Table 5 Workplace environmental monitoring of chemicals by process

From: Case series of keratitis in poultry abattoir workers induced by exposure to the ultraviolet disinfection lamp

Variables Volume (L) Measuring position Measuring time Measurements (ppm) Exposure limit Measurement Way
Cleaning
 Chlorine 320.4 RS 10:01 ~ 15:21 0.0108 0.5 ppm Filtration/IC
 Hydrochloric acid 50.8 RS 11:15 ~ 15:17 ND 1.0 ppm Solid/IC
 Sodium hydroxide 30.0 RS 11:17 ~ 11:32 ND 2.0 mg/m3 Filtration/AA
Cleaning finish       
 Chlorine 324 RS 10:01 ~ 15:21 0.0107 0.5 ppm Filtration/IC
 Hydrochloric acid 55.9 RS 11:15 ~ 15:17 ND 1.0 ppm Solid/IC
 Sodium hydroxide 30.0 RS 11:17 ~ 11:32 ND 2.0 mg/m3 Filtration/AA
Evisceration
 Hydrochloric acid 52.0 RS 11:15 ~ 15:17 ND 1.0 ppm Filtration/IC
 Sodium hydroxide 30.0 RS 11:17 ~ 11:32 ND 2.0 mg/m3 Filtration/AA
  1. RS Regional samples, ND Not detected, IC Ion chromatography, AA Atomic absorption