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Journal Highlight: Tryptophan and cysteine oxidation products dominate in α-lactalbumin-derived peptides analyzed with LC–MSn

Date: Oct 23, 2017

Author: separationsNOW

The oxidation products of tryptophan and cysteine residues in α-lactalbumin, a major milk whey protein, have been identified, which will help to monitor the safety of protein-containing foods, including food supplements for sports nutrition.

Read More thumbnail image: Journal Highlight Tryptophan and cysteine oxidation products dominate in -lactalbumin-derived peptides analyzed with LCMSn

Improved detection of cefonicid with 2D HPLC

Date: Oct 15, 2017

Author: Ryan De Vooght-Johnson

Standard HPLC methods for many pharmaceuticals often use non-volatile salts, such as phosphates, which are incompatible with mass spectrometry. Scientists from Zhejiang University and Zhejiang Institute of Food and Drug Control employed two-dimensional HPLC, with phosphate being used for the first column and formate for the second, to detect novel impurities in the antibiotic cefonicid by mass spectrometry.

Read More thumbnail image: Improved detection of cefonicid with 2D HPLC

Discover leading research in cannabis detection

Date: Oct 3, 2017

Author:

Cannabinoid research from an analytical viewpoint is rapidly developing as a more liberal approach to the medical, legal and social issues of the drug is adopted. Start reading our cannabinoid collection of papers here - free to access until the end of December.

Read More thumbnail image: Discover leading research in cannabis detection

Contamination by quinolones cleverly caught by MLC

Date: Oct 1, 2017

Author: Ryan De Vooght-Johnson

Antibiotic residues in meat can be harmful to consumers and lead to increasing populations of antibiotic-resistant bacteria. Scientists from Jaume I University in Castelló, Spain, successfully developed a validated method using micellar liquid chromatography (MLC) to detect antibiotic residues in various types of meat.

Read More thumbnail image: Contamination by quinolones cleverly caught by MLC

Journal Highlight: Quantification of near-attomole gibberellins in floral organs dissected from a single Arabidopsis thaliana flower

Date: Sep 25, 2017

Author: separationsNOW

A sensitive UHPLC-LC/MS/MS method with derivatisation has been developed to quantify gibberellins in the floral organs (pistil, stamens, petals, sepals and receptacle) dissected from a single Arabidopsis thaliana flower.

Read More thumbnail image: Journal Highlight Quantification of near-attomole gibberellins in floral organs dissected from a single Arabidopsis thaliana flower

Metabolites of deadly NPS elucidated by LC-MS

Date: Sep 16, 2017

Author: Ryan De Vooght-Johnson

Increasing amounts of new psychoactive substances (NPS), such as butyrfentanyl, are being used across Europe. Researchers from the University of Zurich used a combination of UHPLC and a QTOF (quadrupole time-of-flight) mass spectrometer to detect the metabolites of butyrfentanyl produced in-vitro and in-vivo.

Read More thumbnail image: Metabolites of deadly NPS elucidated by LC-MS

Multiple mass spec methods measure dirty money

Date: Sep 6, 2017

Author: Ryan De Vooght-Johnson

Human exposure to traces of bisphenols, at least some of which are endocrine disrupting chemicals, can occur from plastics and till receipts. Researchers from Villanova University, Pennsylvania, compared the sensitivity of three different ionisation methods, ESI, APCI and APPI, towards detecting various bisphenols, and looked at concentrations in till receipts and paper money.

Read More thumbnail image: Multiple mass spec methods measure dirty money

Journal Highlight: Review of HPLC and LC–MS/MS assays for the determination of various nonsteroidal anti-androgens used in the treatment of prostate cancer

Date: Aug 21, 2017

Author: separationsNOW

The literature on bioanalytical methods for the quantification of first- and second-generation nonsteroidal anti-androgens in clinical and preclinical studies has been critically reviewed and some case studies have been presented.

Read More thumbnail image: Journal Highlight Review of HPLC and LCMSMS assays for the determination of various nonsteroidal anti-androgens used in the treatment of prostate cancer

LC-MS/MS detects dangerously doped drivers

Date: Aug 15, 2017

Author: Ryan De Vooght-Johnson

The detection of the levels of cannabis compounds and their metabolites is an important challenge to both medical practitioners and law enforcement agencies. Scientists from the National Institute of Drug Abuse (NIDA) in Baltimore have developed a new method to assay these compounds using enzymatic hydrolysis followed by LC-MS/MS.

Read More thumbnail image: LC-MSMS detects dangerously doped drivers

Monoclonal measured by means of peptide marker

Date: Aug 1, 2017

Author: Ryan De Vooght-Johnson

Monoclonal antibodies are being increasingly used to treat a wide range of diseases, but quantification of their concentrations in blood remains a challenge. Researchers from Naples have used LC-MS to detect a characteristic peptide fragment from the anticancer monoclonal antibody trastuzumab (Herceptin) in order to determine its serum concentration.

Read More thumbnail image: Monoclonal measured by means of peptide marker
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