A sensitive and reliable method for extraction and quantification of benzoylecgonine (BZE) and cocaine (COC) in urine is presented. Propyl-chloroformate was used as derivatizing agent, and it was directly added to the urine sample: the propyl derivative and COC were then recovered by liquid-liquid extraction procedure. Gas chromatography-mass spectrometry was used to detect the analytes in selected ion monitoring mode. The method proved to be precise for BZE and COC both in term of intraday and interday analysis, with a coefficient of variation (CV)<6%. Limits of detection (LOD) were 2.7 ng/mL for BZE and 1.4 ng/mL for COC. The calibration curve showed a linear relationship for BZE and COC (r2>0.999 and >0.997, respectively) within the range investigated. The method, applied to thirty authentic samples, showed to be very simple, fast, and reliable, so it can be easily applied in routine analysis for the quantification of BZE and COC in urine samples.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/1556-4029.12880 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Differential bone calcium retention with the use of oral versus vaginal hormonal contraception: A randomized trial using calcium-41 radiotracer.
Contraception
November 2024
Department of Nutrition Science, Purdue University, West Lafayette, IN, USA.
Objectives: This study aimed to assess if hormonal contraception administered orally (combined oral contraceptive pill, COC) or vaginally (contraceptive vaginal ring) differentially affected bone calcium retention in young females.
Study Design: Reproductive aged females (18-35 years) not using hormonal contraception were dosed with 50 nCi Ca as CaCl in 10 mL of sterile saline (0.9%).
Rapid on-site detection of illicit drugs in urine using C18 pipette-tip based solid-phase extraction coupled with a miniaturized mass spectrometer.
J Chromatogr A
December 2024
Key Laboratory of Drug Monitoring and Control of Zhejiang Province, National Narcotics Laboratory Zhejiang Regional Center, Hangzhou 310053, PR China. Electronic address:
Drug abuse is a social issue worldwide, and there is an increasing demand for on-site rapid detection of illicit drugs. In this study, a rapid and simple analytical method for the detection of 6-monoacetylmorphine (6-MAM), methamphetamine (MA), methylenedioxymethamphetamine (MDMA), ketamine (K), norketamine (NK), and cocaine (COC) in urine was developed. The developed method combines C18 pipette-tip based solid-phase extraction (C18 PT-SPE) with a miniaturized mass spectrometer (miniMS), exhibiting remarkable simplicity, high sensitivity, and strong reliability, compared with the conventional method.
View Article and Find Full Text PDFDevelopment of a dispersive liquid-liquid microextraction method for the evaluation of maternal-fetal exposure to cocaine employing human umbilical cord tissue.
J Anal Toxicol
June 2024
Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, Av. Professor Lineu Prestes, 580, 13B, Sao Paulo, SP 05508-000, Brazil.
Illicit drug use is a serious and complex public health problem, not only due to the severity of the health damage but also to the social implications, such as marginalization and drug trafficking. Currently, cocaine (COC) is among the most abused drugs worldwide with about 22 million users. Drug abuse has also been found in women during the pregnancy period, which has shed light on a new group for epidemiology.
View Article and Find Full Text PDFBackground: Substance use is an important public health problem and increasing all over the world. Different methods have been defined for drug abuse testing in medical laboratories. We aimed to compare two urine drug screening methods with liquid chromatography-tandem mass spectrometry (LC-MS/MS).
View Article and Find Full Text PDFExtracellular vesicles (EVs) hold immense potential for various biomedical applications, including diagnostics, drug delivery, and regenerative medicine. Nevertheless, the current methodologies for isolating EVs present significant challenges, such as complexity, time consumption, and the need for bulky equipment, which hinders their clinical translation. To address these limitations, we aimed to develop an innovative microfluidic system based on cyclic olefin copolymer-off-stoichiometry thiol-ene (COC-OSTE) for the efficient isolation of EVs from large-volume samples in a continuous manner.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!