Abstract:Objective To investigate and analyze the current status of use of organic solvents in printing industry in Shenzhen City so as to provide a scientific basis for implementing comprehensive management of occupational health.Methods Occupational health field surveys were conducted among 20 printing enterprises selected by a stratified-random sampling method in Shenzhen City in 2017. The organic solvents with unknown components used by the enterprises were extracted on-the-spot, and the components were identified by gas chromatography-mass spectrometry. The concentration of the high-risk hazardous chemicals, including n-hexane, benzene, trichloroethylene and dichloromethane in the air of working places was sampled and detected.Results The main occupational hazard factors with the detection rates of volatile organic compounds (VOCs) exceeding 10% in 142 organic solvents used by the 20 printing enterprises were toluene (26.1%, 37/142), acetone (20.4%, 29/142), isopropanol 15.5% (22/142), methanol 14.8% (21/142), n-hexane 14.1% (20/142), n-heptane 12.7% (18/142) and cyclohexane 10.6% (15/142). There were statistically significant differences in the percentage of total peak area of VOCs among solvent-based ink, water-based ink and UV ink (H=8.589, P=0.014). Solvent-based ink was the highest (75.1%), followed by water-based ink (0.6%) and UV ink (0.5%). The concentration-time weighted average (CTWA) of n-hexane in detection points of 1 printing post (325.5 mg/m3) and dichloromethane in detection points of 2 printing posts (367.9 mg/m3, 350.4 mg/m3) was found to exceed the national occupational health standards, respectively overstepping 3.3, 1.8 and 1.8 times those of the standards.Conclusions Ink, detergent, diluent, glue and other organic solvent components used in printing industry in Shenzhen City are relatively complex. Enterprises should strengthen occupational health management, minimize the use of organic solvents with unknown composition, pay special attention to the concept of green environmental protection, stop using solvent-based ink, and promote water-based ink and UV ink.
香映平,周伟,杨光涛,朱晓玲. 2017年深圳市印刷行业有机溶剂组分分析与评价[J]. 实用预防医学, 2019, 26(7): 815-818.
XIANG Ying-ping, ZHOU Wei, YANG Guang-tao, ZHU Xiao-ling. Analysis and evaluation of organic solvent components in printing industry in Shenzhen City, 2017. , 2019, 26(7): 815-818.