河北省有化工厂427个,接触氯化物的职工达万余人,均在低浓度的环境下(1mg/m~3)如液氯、盐酸、漂白粉等车间工作。共检测两个企业接触氯化物车间,空气氯化物浓度接近国家标准,11个样品中有1个样品超标。9个化工厂查体1046人,女工约占25％,年龄最大60岁,最小的17岁,平均31.8岁;工龄最长的35年,最短的0. 17年,平均9.7年;有既往病史者287人,占20.4％,有自觉症状者832人,与对照组比较差别有高度显著性(P<0.01),阳性检出率明显高于对照组。平均工龄长的(15年)与平均工龄短的(5年)相比,肺功能改变有显著增加(P<0.01)。年龄较大者肺功能异常增高。接触氯气的工人吸烟者比不吸烟者的肺功能有明显下降。调查表明:口腔疾患、酸蚀症,咽喉体征明显高于对照组(P<0.01),提示氯化物的危害存在。其他各项体征阳性结果在化工厂之间无关系。但危害与工龄、年龄有 There are 427 chemical plants in Hebei Province and more than 10,000 workers exposed to chlorides, all working under the low concentration environment (1mg / m3) such as liquid chlorine, hydrochloric acid and bleaching powder. A total of two enterprises were exposed to chloride workshop, air chloride concentrations close to the national standard, 11 samples out of a standard sample. 9 chemical plants physical examination 1046 people, about 25% of women, the oldest 60 years old, the youngest 17 years old, average 31.8 years of age; the longest service-life of 35 years, the shortest of 0.17 years, an average of 9.7 years; with previous medical history 287, accounting for 20.4%. There were 832 persons with symptoms, which were highly significant compared with the control group (P <0.01). The positive rate was significantly higher than that of the control group. The mean length of service (15 years) was significantly increased (P <0.01) compared with the short average length of service (5 years). Older pulmonary function abnormalities increased. Workers exposed to chlorine had significantly lower lung function than non-smokers. Surveys show: oral disease, erosion, throat signs were significantly higher than the control group (P <0.01), suggesting the existence of chloride hazards. The other positive results of the signs in the chemical plant has nothing to do. But the harm and seniority, age