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1.
Chinese Journal of Industrial Hygiene and Occupational Diseases ; (12): 619-622, 2019.
Artigo em Chinês | WPRIM | ID: wpr-805688

RESUMO

Objective@#To establish a method for determination of lead and istope ratios in the blood by ISIS-ICP-MS.@*Methods@#After wet digestion, the blood sample was on-line addition of thallium as internal standard and analyzed by ISIS-ICP-MS.@*Results@#The limit of detection was 0.03 μg/L and the lower limit of quantification was 0.08 μg/L. The detection concentration was 0.45 μg/L and the minimum quantitative concentration was 1.49 μg/L. The relative standard deviations (RSD) were 0.3%~1.7%. The recovery was between 91.0% and 103.4%. The precision of the major lead isotope ratios was better than 0.3%. The calibrated isotope ratios of the standard liquid are close to the certificate.@*Conclusion@#The method has a low detection limit, good precision and high accuracy, it is feasible for determination of lead concentration and isotope ratios in the bloune.

2.
Chinese Journal of Industrial Hygiene and Occupational Diseases ; (12): 453-456, 2019.
Artigo em Chinês | WPRIM | ID: wpr-805350

RESUMO

Objective@#To establish a solvent desorption gas chromatographic method for determination of Sevoflurane, Isoflurane and Enflurane in the air of the Workplace.@*Methods@#Sevoflurane, Isoflurane and Enflurane were collected with activated carbon tube and desorbed with dichloromethane, separated with DB-1 capillary columns, and then detected with flame ionization detector.@*Results@#The linearity ranges were 1.9-304.8 μg/ml for Sevoflurane, 2.1-300.4 μg/ml for Isoflurane and 1.7-305.2 μg/ml for Enflurane, The correlation coefficient was both >0.999. Their limits of detection were 0.6 μg/ml, 0.6 μg/ml and 0.5 μg/ml, and Their limits of quatification were 1.9 μg/ml, 2.1 μg/ml and 1.7 μg/ml, and their minimum detectable concentrations were 0.1、0.2 and 0.1 mg/m3 per 4.5 L of air. Their relative standard deviations (RSD) were 2.5%-3.0%, 2.3%-3.1% and 2.2%-3.0%. The average desorption efficiencies were 101.1%-103.3%, 100.7%-102.7% and 101.0%-102.9%. The sampling efficiency was both 100%. The breakthrough volume of 100 mg actived carbon was 3.7 mg, 3.4 mg and 3.4 mg. Sevoflurane, Isoflurane and Enflurane in activated carbon tube could be kept at least 10 days at room temperature without significant losses.@*Conclusion@#The method shows lower detection limit, high accuracy and precision. It is feasible for determination of Sevoflurane, Isoflurane and Enflurane in the air of workplace.

3.
Chinese Journal of Industrial Hygiene and Occupational Diseases ; (12): 535-537, 2018.
Artigo em Chinês | WPRIM | ID: wpr-806804

RESUMO

Objective@#To establish a method for the determination of manganese in urine by graphite furnace atomic absorption spectrometry (AAS) without the use of matrix modifier.@*Methods@#The urine samples were 5 times diluted with 1% nitric acid then directly determined by AAS. Zeeman was used for background correction.@*Results@#The linear range for determination of manganese in urine was 5~60 μg/L (urine) . The correlation coefficient was greater than 0.995 with the detection limit of 1.5 μg/L and with the lower limit of quantification of 5.0 μg/L. The relative standard deviations (RSDs) of within-run precision was between 1.1%~4.3%, the RSDs of between-run precision was between 3.3%~7.0%. The average recovery was 102.6%. The samples can be stored for 14 days at room temperature, 4℃, -8 ℃ and -35 ℃.@*Conclusion@#The method is feasible for determination of manganese in urine.

4.
Chinese Journal of Industrial Hygiene and Occupational Diseases ; (12): 305-307, 2018.
Artigo em Chinês | WPRIM | ID: wpr-806313

RESUMO

Objective@#To establish a method for determination of acetone, dichloromethane, hexane, 1, 1, 1-trichloroethane, 1, 2-dichloroethane, benzene, toluene, ethylbenzene etc organic compounds in urine by headspace gas chromatography-mass spectrometry (GC-MS) . @*Methods@#Headspace gases of urine samples were injected into GC and determined by mass. @*Results@#Determination of urine components were in a good linear range in their concentration range of this method. The correlation coefficients were between 0.996 and 1.000 with the detection limits between 0.1 μg/L and 4.5 μg/L, the precisions were between 1.3% and 4.6%, the recovery rates were between 86.2% and 97.4%. @*Conclusion@#This method has the advantages of low detection limits, high accuracy, high precision and simple pretreatment, which is suitable for the determination of the content of various volatile organic compounds in urine.

5.
Chinese Journal of Industrial Hygiene and Occupational Diseases ; (12): 929-931, 2015.
Artigo em Chinês | WPRIM | ID: wpr-312082

RESUMO

<p><b>OBJECTIVE</b>To establish the method of capillary column gas chromatography for determination of ethylene glycol in workplace air.</p><p><b>METHODS</b>Ethylene glycol in workplace air was collected with silicone tube, desorbed with methanol, separated with FFAP (nitroterephthalic acid-modified polyethylene glycol)capillary column, and measured with flame ionization detector.</p><p><b>RESULTS</b>The detection limit of ethylene glycol was 0.41 mg/L, the lower limit of quantification was 1.4 mg/L, the range of measurement was 1.4~163.9 mg/L, and the minimum detectable concentration was 0.3 mg/m3 (1.5 L of air was collected as the sample). This method had a good repeatability, the relative standard deviation was 1.4%~5.2%, the average desorption efficiency was 94.4%~101.7%, and the sampling efficiency was 99.2%~100%. The penetrating capacity of 200 mg silicone was higher than 6.9 mg, and the samples could be preserved for 14 days at room temperature.</p><p><b>CONCLUSION</b>The method has a low detection limit, high accuracy, and good precision, which is feasible for determination of ethylene glycol in workplace air.</p>


Assuntos
Poluentes Ocupacionais do Ar , Cromatografia Gasosa , Etilenoglicol , Local de Trabalho
6.
Chinese Journal of Industrial Hygiene and Occupational Diseases ; (12): 304-306, 2015.
Artigo em Chinês | WPRIM | ID: wpr-326001

RESUMO

<p><b>OBJECTIVE</b>To develop a solvent desorption gas chromatographic method for determination of n-pentanol in the workplace air.</p><p><b>METHODS</b>n-Pentanol in the workplace air was collected with activated carbon tubes, desorbed with 2% 2-propanol in carbon disulfide, separated with a nitroterephthalic acid-modified FFAP capillary column, and detected with flame ionization detector.</p><p><b>RESULTS</b>The limit of detection was 0.2 mg/L; the lower limit of quantification was 0.6 mg/L; the linear range was 0.6-4072.0 mg/L. The minimum detectable mass concentration was 0.2 mg/m3 for 1.5 L of air sample. This method was highly repeatable. The relative standard deviations were 2.3%-5.4%. The average desorption efficiencies were 86.9%-94.2%. The absorption efficiencies were 100%. The breakthrough volume was above 8.0 mg in 100-mg activated carbon. The samples in activated carbon tubes could be stored for at least 14 days at room temperature.</p><p><b>CONCLUSION</b>The method is feasible for determination of n-pentanol in the workplace air.</p>


Assuntos
2-Propanol , Poluentes Ocupacionais do Ar , Dissulfeto de Carbono , Carvão Vegetal , Cromatografia Gasosa , Limite de Detecção , Pentanóis , Solventes , Local de Trabalho
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