scholarly journals Measuring mercury in urine among students & professors at the faculty of dentistry exposed to mercury vapor by cold vapor atomic absorption technique

2019 ◽  
Author(s):  
ST Mirmohammadi ◽  
SZ Hosseinalipour ◽  
A Tirgar ◽  
B Shabankhani
Keyword(s):  
Atomic Absorption ◽  
Mercury Level ◽  
Mercury Vapor ◽  
Dental Students ◽  
Cold Vapor ◽  
Urinary Mercury ◽  
Cold Vapor Atomic Absorption ◽  
Significant Difference ◽  
Mercury In Urine ◽  
Urine Mercury

Introduction: Dentists are exposed to mercury vapor due to the occupational exposure to amalgam, which can endanger their health. The aim of this study was to determine the effect of mercury vapor on urinary mercury concentration of dental students and the restorative specialists in one of the dental schools of Iran. Methods: The study population consisted40 dental students and 10 restoration specialists. Sample urine at the end of work time was collected, and the concentration of mercury in urine was measured by cold vapor atomic absorption spectrophotometry. A questionnaire was completed to determine the effects of some personal and environmental factors on the amount of urinary mercury. Data were analyzed using SPSS-22 software. Results: The mean concentration of urinary mercury in dental students was 15.18±4.34μg/L and the restoration specialists were 4.11±1.05μg/l. In addition, there was a significant difference between the concentrations of urinary mercury in the two groups (P <0.001). At specialist professors there was a negative correlation between urinary mercury and working hours per day (r=-0.78, p=0.007). Also, in this study, there was a significant relationship between urine mercury and sex, age, type of amalgam consumed, consumption of smoking and the number of amalgam restorations. Conclusion: The level of urine mercury in all samples was lower the recommended amount of ACGIH. The study is recommended mercury level monitoring for regularly evaluation of the workplace.

Direct determination of total mercury in urine samples using flow injection catalytic cold vapor atomic absorption spectrometry (FI-CCV-AAS)

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 80354-80360 ◽  
Author(s):  
A. Sabouri ◽  
S. Nouroozi
Keyword(s):  
Atomic Absorption ◽  
Flow Injection ◽  
Total Mercury ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
Urine Samples ◽  
Cold Vapor ◽  
Cold Vapor Atomic Absorption ◽  
Mercury In Urine

A rapid flow injection catalytic cold vapor atomic absorption spectrometric (FI-CCV-AAS) method is described for determination of total mercury in urine samples.

Modified Procedure for Determining Mercury in Coal by Cold Vapor Atomic Absorption Spectrophotometry

1973 ◽  
Vol 56 (6) ◽  
pp. 1509-1510
Author(s):  
Fa-Chun Lo ◽  
Brian Bush
Keyword(s):  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Particle Sizes ◽  
Cold Vapor ◽  
Absorption Spectrophotometry ◽  
Cold Vapor Atomic Absorption

Abstract The combustion procedure previously described for the determination of mercury in coal by cold vapor atomic absorption spectrophotometry has been modified to permit samples to be analyzed more rapidly and with better precision. A coefficient of 8.3% was obtained for the analysis of 7 samples containing 0.1 ppm mercury. In addition a greater variety of types and particle sizes of coal can be analyzed by the modified procedure.

Improved Apparatus for Rapid Mercury Determination by Cold Vapor Atomic Absorption Spectrometry

1983 ◽  
Vol 66 (5) ◽  
pp. 1117-1120
Author(s):  
Lawrence Kupchella ◽  
Augusta Syty ◽  
John J Mahfood
Keyword(s):  
Atomic Absorption ◽  
Analytical Signal ◽  
Absorption Spectrometry ◽  
Water Quality Control ◽  
Injection Port ◽  
Cold Vapor ◽  
Cold Vapor Atomic Absorption ◽  
Relative Standard ◽  
Atomic Absorption Spectrometric

Abstract A glass reaction vessel is described and the convenience and simplicity of its use in cold vapor atomic absorption spectrometric determination of mercury are pointed out. The vessel is easy to construct and requires only 15 s for collection of the analytical signal. It provides for continuous flow of carrier gas, and contains a septum-covered sample injection port, a buret for rapid introduction of reagent, and a drain stopcock. Using this apparatus, the relative standard deviation is 2.9% at the 40 ng Hg/mL level. The detection limit is 1 ng/mL. Applicability of the apparatus is proved by analysis of 3 commercial waste water quality control samples.

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