Objective To establish a method for the detection of formaldehyde in workplace air by the automatic discrete analyzer.Methods The discontinuous chemical analyzer was used instead of the manual method for the determination of formaldehyde.The detection steps and test working conditions were determined;the linear range,detection limit,accuracy,precision,and other indicators of the method were observed and compared with the GBZ/T 300.99-2017 method.Results There was a linear relationship between formaldehyde concentration ranging from 0 to 0.4 mg/L and absorbance,with a correlation coefficient of 0.999 9.The detection limit was 0.000 9 mg/L,and the minimum detection concentration was 0.001 5 mg/m3(calculated by collecting 3 L of air sample).The intra-assay precision was 2.39％-4.75％,and the inter-assay precision was 2.91％-9.30％.The results of the standard samples were within the calibration range.When this method was used for the determination of formaldehyde in the air of the workplaces,the relative error between the measured value and the value derived by the national standard method was within 10％,and the two groups of results had a good linear correlation(r=0.998,P＜0.001).Conclusions The automatic discrete analyzer had a high degree of automation,sensitivity,linear relationship,precision,and accuracy in determining formaldehyde in the air of the workplaces.It can replace the manual method and is suitable for efficient detection of formaldehyde in the air of the workplaces.

于血浆中加入硫酸异丙醇溶液,在自动顶空进样器中加热,甲酸与异丙醇发生酯化反应生成甲酸异丙酯经气相色谱分离,以质谱检测,外标法定量.结果显示,血中甲酸浓度在0.00～97.60 μg/ml时线性关系良好,相关系数r=0.999 9,方法检出限为0.25 μg/ml,定量下限0.75 μg/ml,加标回收率为97.1％～99.3％,批内精密度0.8％～6.9％,批间精密度1.3％～5.6％.该方法前处理简单,自动化程度高,特异性好,灵敏度、准确度、精密度高,可用于血中甲酸的测定.

工作场所中栎精分光光度测定二氧化锡标准方法中存在问题,故对该实验进行了研究和优化.优化后实验的最适反应条件为酸度0.02 mol/L盐酸,栎精为0.15 g/L,乙醇为50％;方法检出限为0.089μg/mL,定量下限为0.134μg/mL,线性范围为0.134～3.051μg/mL,最低检出浓度为0.06 mg/m3;当样品加标量为低、 中、 高三个浓度水平(约0.5 mg、1.0 mg、1.5 mg)时按实验原来的前处理方法处理样品所得加标回收率为35.1％、40.1％、47.3％,优化后的加标回收率提升为93.3％、95.4％、97.5％.

[目的]了解职业卫生管理人员职业病防治知识、态度和行为得分情况以及三者之间的相关性,探讨职业健康教育对职业病防治工作的重要性.[方法]采用整群抽样的方法选取某市某区882名职业卫生管理人员进行线上调查,对数据进行统计学分析.[结果]文化程度不同的管理人员在知识、态度、行为以及总分4个方面的得分差异均有统计学意义(P＜0.05),且文化程度越高,其得分也越高.不同年龄、性别、工龄、月收入的管理人员仅表现出部分得分的差异有统计学意义(P＜0.05),在有差异的项目中,均以年龄小者、男性、月收入低者、工龄短者较低.PPE选择正确组的职业卫生知识得分高于选择错误组(P＜0.01).职业卫生管理人员的知识、态度和行为三者得分间均有弱的正相关关系(rs=0.14～0.25,P＜0.01).被调查的管理人员中喜欢以听专家讲座的形式来获得职业卫生知识的最多,达54.88％.[结论]性别、年龄、月收入、工龄,尤其是文化程度,对管理人员的知-信-行得分均有一定的影响.职业卫生管理人员足够的职业病防治知识基础、积极的态度和恰当的行为之间存在一定的相互关系.

Objective To establish a detection method for 1-bromopropane in human urine by headspace gas chromatography-mass spectrometry ( GC-MS) .Methods A 4.00 mL portion of the urine sample was placed in a 15.00 mL headspace vial and 20.00μL of 1-bromobutane internal standard solution (204.200 mg/L mass concentration) was added. The bottle cap was immediately sealed .The sample was heated to 80 ℃ with an equilibrium time of 20 minutes in the headspace device .The vapor in the headspace vial was separated by GSBP-FFAP ( 30.00 m ×0.25 mm ×0.25 μm ) capillary chromatography column and the ion was used to carry out quantitative determination of 1-bromopropane in human urine.Results The good linearity range of 1-bromopropan mass concentration was 0.025-1.012 mg/L, and the correlation coefficient was 0.999 8.The detection limit was 7.5 μg/L (urine sample volume, 4.00 mL) and the limit of quantitation was 25.0 μg/L (urine sample volume, 4.00 mL).The relative standard deviation (RSD) of within-run precision was 2.61%-4.08%, and the RSD of between-run precision was 2.79%-6.25%.The average recovery rate was 99.34%-105.94%.Conclusion The method of determining 1-bromopropane in human urine by headspace GC-MS has the features of high sensitivity , good linear relationship , low interference , good precision and easy operation , which is suitable for detecting 1-bromopropane mass concentration in human urine .

采用冷原子蒸气发生-原子荧光光谱法测定尿中的汞.尿样加入溴化剂处理后,直接用冷原子蒸气发生-原子荧光光谱法测定汞的含量.汞的质量浓度在0.15～10.0μg·L-1范围内呈线性,检出限(3s)为0.15μg·L-1.方法用于质控样品的分析,测定值与认定值相符,测定值的相对标准偏差(n=6)在2.8％～3.8％之间.应用此方法对实样进行测定,结果与冷原子吸收光谱法的测定结果相符.

目的用直接进样-氢化物发生原子荧光光谱法测定尿铅水平。方法尿样加入到硝酸溶液中振摇混匀后,直接用氢化物发生原子荧光光谱法测定尿铅水平。结果本法在0.90～300.00μg/L线性关系良好,相对标准偏差为3.09%～6.84%,检出限0.90μg/L,加标回收率为93.9%～102.0%,平均回收率为97.4%。结论本法准确、可靠、灵敏、操作简单快捷,适合基层单位普遍应用。