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测定尿铅含量是铅作业工人进行体检时的主要项目之一。有关收集尿样问题,一般采集24小时混合尿作为测定尿铅含量的样品,但常因收集尿样时受诸因素之影响,使检验结果失去真实,给诊断带来一定困难。因此。探求某一次尿或某一段时间内混合尿代替24小时混合尿样的调查研究。亦被广大职防人员所重视,近年来也见到这方面的一些报导。我们结合铅普查工作,对部分铅作业工人的晨尿(晨起第一次尿)与24小时混合尿含量作了观察比较,现将结果报告如下: 调查方法观察对象分不同行业的84名接触铅作业的工人,不分工龄和性别,每人分别收集晨尿和24小时混合尿作为检验样品、以观察尿铅含量规律。尿铅测定:每份尿样取平行样品,采用热硝化双硫腙比色法,取尿样50毫升,于凯氏烧瓶内,加入浓硝酸7毫升,浓硫酸3毫升,加热硝化至微黄色,加过氯酸1毫升,
Determination of lead in urine is one of the main items of lead workers in the medical examination. The collection of urine samples, generally collected 24 hours mixed urine as a measure of urine lead content of the sample, but often due to the collection of urine samples by the impact of various factors, the test results lost true, to bring some difficulties in the diagnosis. therefore. Investigate a single urine or mixed urine over a period of time instead of a 24-hour mixed urine sample. It is also valued by the majority of staff in the military. In recent years, some reports in this regard have also been seen. We combine the lead screening work, part of the lead workers morning urine (morning urine) and 24-hour mixed urine were observed and compared, the results are reported as follows: Survey method: 84 contacts in different industries Lead workers, regardless of age and gender, were collected morning urine and 24 hours mixed urine as a test sample to observe the law of urine lead content. Determination of urinary lead: Take a parallel sample of each urine sample, using thermal nitration dithizone colorimetric method, take a urine sample of 50 ml, in a Kjeldahl flask, add concentrated nitric acid 7 ml, concentrated sulfuric acid 3 ml, heated nitrification to light yellow , Add 1 ml of perchloric acid,