Article
Biochemical Research Methods
Eric Langlois, Sebastien Gagne
Summary: An ultrahigh-performance liquid chromatography-tandem mass spectrometry method was developed for analyzing o-cresol in human urine for biological monitoring of toluene exposure. This method is widely used by occupational health and safety practitioners to assess both non-occupational and occupational toluene exposure, with high sensitivity and accuracy.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2023)
Review
Biochemical Research Methods
Xiaoyue Shan, Lei Zhang, Haipeng Ye, Ji Shao, Yanpeng Shi, Siwei Tan, Ling Zhang, Kewen Su
Summary: Analytical techniques for monitoring hippuric acid and methylhippuric acid in human urine matrices from 2016 to 2021 were presented in this study, using high performance liquid chromatography coupled with UV detection. This provides valuable information on toluene and xylene exposure conditions.
Article
Environmental Sciences
Ahlam Abuawad, Jeff Goldsmith, Julie B. Herbstman, Faruque Parvez, Tariqul Islam, Nancy LoIacono, Joseph H. Graziano, Ana Navas-Acien, Mary Gamble
Summary: This study aimed to evaluate which urine dilution correction methods for urinary arsenic (uAs) most accurately predicted blood arsenic (bAs). The results showed that uAs adjusted for urinary creatinine (uCr) had stronger associations with bAs compared to specific gravity (SG), suggesting that considerations should be made regarding factors such as methylation or medical conditions when choosing urine dilution methods.
Article
Engineering, Environmental
Huiqi Wang, Jingjing Han, Zhanfeng Li, Zonghua Wang
Summary: A new magnetic solid phase extraction sorbent was designed for purifying and enriching HA and 4-MHA. The sorbent showed high stability and recyclability, and was able to analyze HA and 4-MHA in real samples.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Applied
Chi Hieu Nguyen, Chun-Chieh Fu, Ze-Han Chen, Thi Tuong Van Tran, Shou-Hsuan Liu, Ruey-Shin Juang
Summary: The study modified SBA-15 particles with APTES, increasing the adsorption capacity for urea and creatinine. Competitive hydrogen bonding promoted the preferential adsorption of urea over hippuric acid in binary mixtures on the APTES-modified SBA-15 adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Israa J. Hakeem, Melese Abeyie
Summary: This study was conducted on printing industry workers in Addis Ababa, Ethiopia. The findings revealed that these workers are exposed to harmful volatile organic compounds such as benzene and toluene, highlighting the need for further protection and research to ensure their health.
ADSORPTION SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Katharina Oginawati, Annisa Artsani Hanif Anka, Septian Hadi Susetyo, Sri Awalia Febriana, Ikeu Tanziha, Cita Rosita Sigit Prakoeswa
Summary: The study found that batik workers exposed to toluene had higher levels of urinary hippuric acid compared to non-batik workers. Workers with longer working periods, those performing writing tasks, and stamping workers were more likely to have higher concentrations of uHA. Additionally, workers exhibiting symptoms of toluene exposure also showed higher uHA concentrations.
Article
Biology
Mansour A. Balkhyour, Radhouane Chakroun, Faycal Faidi
Summary: The aim of this study was to assess the exposure to Toluene in the paint industry and evaluate the environmental and biological monitoring techniques. Air and biological samples were collected from workers in two factories, and the results showed high exposure levels to Toluene. The correlation between the biomarker HA and air concentrations was the strongest.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2023)
Article
Biodiversity Conservation
Sunisa Chaiklieng, Pornnapa Suggaravetsiri, Norbert Kaminski, Herman Autrup
Summary: This study assessed the adverse effects of benzene and toluene exposure in gasoline station workers through biological screening and health risk assessment. There was a significant correlation between benzene and toluene concentrations, metabolites levels, and adverse symptoms reported by workers.
HUMAN AND ECOLOGICAL RISK ASSESSMENT
(2021)
Article
Chemistry, Analytical
Elnaz Taheri, Saeed Yousefinejad, Fatemeh Dehghani
Summary: This study aimed to identify the factors that may affect the biological monitoring of benzene, toluene, and xylene (BTX) metabolites. The results showed significant differences in the levels of biomarkers between the exposed and non-exposed groups. The regression model demonstrated that level of education, work experience, residence, length of work per shift, use of personal protective equipment (PPE), and consumption of industrial food or fruit juice significantly affected the biomarker levels.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Public, Environmental & Occupational Health
Klaus Abraham, Katharina Penczynski, Bernhard H. Monien, Nick Bergau, Sven Knueppel, Cornelia Weikert
Summary: This study compared the concentration of a specific metabolite in the urine of vegans and omnivores, and found that the difference disappeared when adjusted for creatinine. However, after adjusting for creatinine, the concentration in omnivores was found to be 26% lower than in vegans. This may be due to the consumption of meat and fish as exogenous sources of creatinine.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2023)
Article
Environmental Sciences
Jordan R. Kuiper, Katie M. O'Brien, Kelly K. Ferguson, Jessie P. Buckley
Summary: Urinary specific gravity and creatinine are influenced by factors such as gender, race/ethnicity, body mass index, and height. The agreement between correction methods for chemical concentrations using specific gravity was greater compared to creatinine. Additionally, using a covariate-adjusted standardization method for correction showed slightly higher agreement between specific gravity and creatinine-corrected chemical concentrations.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Medicine, General & Internal
Chiari Kojima, Hiroshi Umemura, Tatsuo Shimosawa, Tomohiro Nakayama
Summary: This study compared the urine protein dipstick test with a urine protein quantification method and found that the dipstick test can produce false-positive and false-negative results. It is especially important to evaluate the specific gravity of urine specimens with trace proteinuria, as the sensitivity of the dipstick test is low, particularly for women.
FRONTIERS IN MEDICINE
(2023)
Article
Transplantation
Yishan Dong, Stephen M. Silver, Richard H. Sterns
Summary: Spot determinations of urine creatinine concentration are commonly used to estimate 24-hour urine excretion rates, but these estimates can be inaccurate if the serum creatinine concentration is changing or if there are extreme variations in muscle mass. Several equations have been proposed for estimating urine volume based on urine creatinine concentrations, but none of them are accurate in all situations.
NEPHROLOGY DIALYSIS TRANSPLANTATION
(2023)
Article
Chemistry, Analytical
Keshuai Shang, Shuangjue Wang, Siyu Chen, Xia Wang
Summary: A multifunctional electrochemical sensor was proposed for sensitive detection of uric acid and creatinine. The sensor demonstrated good performance in detecting uric acid and creatinine in urine samples, showing comparable results to high-performance liquid chromatography (HPLC). It exhibited many advantages in practical applications, including short detection time, high stability, simple operation, strong anti-interference ability, cost-effectiveness, and easy fabrication.