Abstract:
:Urine lead level is one of the most employed measures of lead exposure and risk. The urine samples used in this study were obtained from ten healthy male cyclists. Dispersive liquid-liquid microextraction combined with ultraviolet and visible spectrophotometry was utilized for preconcentration, extraction, and determination of lead in urine samples. Optimization of the independent variables was carried out based on chemometric methods in three steps. According to the screening and optimization study, 133 μL of CCl4 (extracting solvent), 1.34 mL ethanol (dispersing solvent), pH 2.0, 0.00 % of salt, and 0.1 % O,O-diethyl dithiophosphoric (chelating agent) were used as the optimum independent variables for microextraction and determination of lead. Under the optimized conditions, R 2 was 0.9991, and linearity range was 0.01-100 μg L-1. Precision was evaluated in terms of repeatability and intermediate precision, with relative standard deviations being <9.1 and <15.3 %, respectively. The accuracy was estimated using urine samples of cyclists as real samples and it was confirmed. The relative error of ≤5 % was considered significant in the method specificity study. The lead concentration mean for the cyclists was 3.79 μg L-1 in urine samples. As a result, the proposed method is a robust technique to quantify lead concentrations higher than 11.6 ng L-1 in urine samples.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Faraji H,Helalizadeh Mdoi
10.1007/s12011-016-0844-7subject
Has Abstractpub_date
2017-04-01 00:00:00pages
258-269issue
2eissn
0163-4984issn
1559-0720pii
10.1007/s12011-016-0844-7journal_volume
176pub_type
杂志文章abstract::The current information about the effect of physical exercise on the body concentrations of several minerals is still limited, both in the acute (short-term) and adaptive (long-term) responses. So, this manuscript aims, on the one hand, to assess the possible differences on basal levels of cobalt (Co), copper (Cu), an...
journal_title:Biological trace element research
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journal_title:Biological trace element research
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journal_title:Biological trace element research
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journal_title:Biological trace element research
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journal_title:Biological trace element research
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journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02783968
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journal_title:Biological trace element research
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journal_title:Biological trace element research
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journal_title:Biological trace element research
pub_type: 杂志文章
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journal_title:Biological trace element research
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journal_title:Biological trace element research
pub_type: 杂志文章
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journal_title:Biological trace element research
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journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02916540
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journal_title:Biological trace element research
pub_type: 杂志文章
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journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02783138
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journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02789402
更新日期:1993-04-01 00:00:00
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journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02917454
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