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以往调查报告认为,生产环境空气汞浓度超过0.1mg/m~3,暴露3～4年可致慢性汞中毒。本文调查结果,仅接触1年即可出现汞中毒,6个月即可出现汞吸收。暴露浓度为0.01～0.1mg/m~3者,1年可出现汞吸收,2年以上可出现汞中毒。其检出率与暴露剂量相关。汞危害的症状体征,以神经精神症状和口腔炎、齿龈炎为主。神经系统亚临床异常,采用神经行为学试验,表明汞作业工人神经系统功能障碍主要表现在记忆力、注意力集中程度明显下降,与对照组相比,差异有显著意义(p<0.05),以触摸试验和神经抑制性试验较为敏感。本文用F—732型测汞仪对68例非汞接触的健康人群进行尿汞测定,95％上限值为0.0076mg/l,建议以0.01mg/l作为郑州地区汞过量吸收限值。
According to previous surveys, the concentration of mercury in the air of the production environment exceeds 0.1 mg / m 3, and chronic mercury poisoning can occur after 3 to 4 years of exposure. The findings of this paper, mercury poisoning can occur only in contact with one year, mercury absorption occurs 6 months. Exposure to the concentration of 0.01 ~ 0.1mg / m ~ 3, 1 year mercury absorption can occur, more than 2 years mercury poisoning can occur. The detection rate and exposure dose related. Mercury hazard symptoms and signs to neuropsychiatric symptoms and stomatitis, gingivitis-based. Nervous system subclinical abnormalities, using neurobehavioral tests, showed that mercury workers in the nervous system dysfunction mainly in memory, concentration decreased significantly, compared with the control group, the difference was significant (p <0.05), to touch Test and nerve inhibition test is more sensitive. In this paper, urinary mercury was measured in 68 healthy people without mercury exposure by F-732 Mercury Analyzer. The upper limit of 95% is 0.0076mg / l. It is recommended that 0.01mg / l should be used as limit of mercury excess in Zhengzhou.