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Journal Highlight: Transfer rates of aflatoxins from herbal medicines to decoctions determined by an optimized HPLC with fluorescence detection method

Date: Feb 19, 2018

Author: separationsNOW

The transfer rates of aflatoxins from five fungi-contaminated raw herbal medicines to their decoctions have been measured by HPLC with fluorescence detection after postcolumn photochemical derivatization.

Read More thumbnail image: Journal Highlight Transfer rates of aflatoxins from herbal medicines to decoctions determined by an optimized HPLC with fluorescence detection method

Super isomer separation succeeds with cellulose

Date: Feb 15, 2018

Author: Ryan De Vooght-Johnson

Pyrethroids are widely used insecticides, which are usually sold as mixtures of enantiomers. These isomers have different activities and environmental effects. Scientists from China's Southwest University in Chongqing have developed new methods to separate the enantiomeric isomers of two pyrethroids, bifenthrin and lambda-cyhalothrin, using reversed-phase HPLC.

Read More thumbnail image: Super isomer separation succeeds with cellulose

Design and degradation in drug determination

Date: Feb 1, 2018

Author: Ryan De Vooght-Johnson

There is a need for new analytical methods for the anticancer drug sorafenib, which are suitable both for the compound itself and its degradation products. Researchers from Panjab University in India used an analytical quality by design approach (AQbD), including a face-centred cubic experimental design, to devise a new HPLC method for sorafenib and its degradation products.

Read More thumbnail image: Design and degradation in drug determination

Journal Highlight: Chromatographic methods in HIV medicine: Application to therapeutic drug monitoring

Date: Jan 22, 2018

Author: separationsNOW

This review summarises the analytical methods relevant to therapeutic monitoring of HIV drugs, including HPLC-UV and LC-MS/MS, while highlighting respective challenges.

Read More thumbnail image: Journal Highlight Chromatographic methods in HIV medicine Application to therapeutic drug monitoring

Micrograms enough for LC on dyestuffs

Date: Jan 16, 2018

Author: Ryan De Vooght-Johnson

Various plants containing coloured alkaloids have been used as dyestuffs in the past, so there is a demand for analytical methods that can deal with small sample sizes, thus allowing the investigation of historical textiles. Scientists from Warsaw University of Technology have developed a new capillary HPLC method for these alkaloids, investigating its use with silk and wool.

Read More thumbnail image: Micrograms enough for LC on dyestuffs

LC-MS can show the way to measure hypoglycin A

Date: Jan 1, 2018

Author: Ryan De Vooght-Johnson

Atypical myopathy is a potentially fatal horse disease caused by eating toxic plant material, such as sycamore seeds. Researchers from Jena University Hospital and the FZMB Veterinary Clinic in Bad Langensalza in Germany have developed a new UHPLC-MS/MS method to quantify the relevant toxins (hypoglycin A and MPCA-carnitine) in horse serum.

Read More thumbnail image: LC-MS can show the way to measure hypoglycin A

Journal Highlight: Diagnostic accuracy of increased urinary cortisol/cortisone ratio to differentiate ACTH-dependent Cushing's syndrome

Date: Dec 18, 2017

Author: separationsNOW

HPLC-UV and LC-MS/MS have been used to measure urinary free cortisol and cortisone and the cortisol to cortisone ratio in patients with Cushing's disease and ectopic ACTH syndrome to improve diagnostic accuracy.

Read More thumbnail image: Journal Highlight Diagnostic accuracy of increased urinary cortisolcortisone ratio to differentiate ACTH-dependent Cushings syndrome

Acetic acid additive best for negative ESI

Date: Dec 13, 2017

Author: Ryan De Vooght-Johnson

There is little consensus about the best additives to use for LC-MS negative electrospray ionisation (negative ion ESI). Scientists from Concordia University, Montreal, compared the effects of acetic acid, ammonium hydroxide and ammonium acetate on LC-MS negative ion ESI using mixtures of lipid standards and also extracted human lipids.

Read More thumbnail image: Acetic acid additive best for negative ESI

Olive flower phenolics finish off free radicals

Date: Dec 1, 2017

Author: Ryan De Vooght-Johnson

Olives are an important commercial crop in a number of countries, but little work has been carried out on the chemical composition of olive tree flowers. Scientists from the University of Sfax in Tunisia examined the composition of olive flowers by HPLC and LC-MS, looking at changes in the compounds present and in the overall antioxidant power of the flower extracts.

Read More thumbnail image: Olive flower phenolics finish off free radicals

Journal Highlight: Directly-coupled-column ultra-fast liquid chromatography with diode array detection method for the rapid quantification of allergenic disperse dyes in water preconcentrated by magnetic solid-phase extraction

Date: Nov 20, 2017

Author: separationsNOW

Directly-coupled-column ultra-fast liquid chromatography coupled with diode array detection for the determination of 12 allergenic disperse dyes in river water at sub-ppb levels has been developed and successfully validated.

Read More thumbnail image: Journal Highlight Directly-coupled-column ultra-fast liquid chromatography with diode array detection method for the rapid quantification of allergenic disperse dyes in water preconcentrated by magnetic solid-phase extraction
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