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Journal Highlight: Derivatization‐free determination of short‐chain volatile amines in human plasma and urine by headspace gas chromatography‐mass spectrometry

Date: Nov 13, 2019

Author: separationsNOW

A broadly applicable headspace-GC/MS procedure has been developed for the simultaneous and quantitative determination of di- and trimethylamine and di- and triethylamine in human plasma and urine without derivatization.

Read More thumbnail image: Journal Highlight Derivatizationfree determination of shortchain volatile amines in human plasma and urine by headspace gas chromatographymass spectrometry

Disease that sometimes leads to death detected by GC of breath

Date: Nov 5, 2019

Author: Ryan De Vooght-Johnson

Chronic obstructive pulmonary disease (COPD) is a serious lung disease where early detection can be very beneficial. A team from the Autonomous University of San Luis Potosí and San Luis Potosí Central Hospital (both Mexico) developed a method of detecting COPD by examining organic volatile compounds in patients’ breath using an electronic nose that employed ultrafast GC.

Read More thumbnail image: Disease that sometimes leads to death detected by GC of breath

Journal Highlight: Investigating volatile compounds’ contributions to the stale odor of green tea

Date: Oct 16, 2019

Author: separationsNOW

Fifteen volatiles that contribute to stale odour of green tea were extracted using headspace‐solid phase microextraction and identified using gas chromatography‐mass spectrometry and gas chromatography olfactometry.

Read More thumbnail image: Journal Highlight Investigating volatile compounds contributions to the stale odor of green tea

Tackling LC-GC peak distortion gives good chiral separation

Date: Oct 15, 2019

Author: Ryan De Vooght-Johnson

The tandem coupling of achiral HPLC to chiral GC can lead to the effective separation of enantiomeric pairs in complex mixtures, but peak distortion can be a serious problem. Researchers optimised the separation of lactone enantiomers using LC-GC with a ‘Through Oven Transfer Adsorption Desorption’ or ‘TOTAD’ interface.

Read More thumbnail image: Tackling LC-GC peak distortion gives good chiral separation

Prior silylation aids cashew phenol separation

Date: Oct 1, 2019

Author: Ryan De Vooght-Johnson

Cashew nut shell oil has a variety of industrial uses, but improved analytical methods are needed. A team of scientists from the T.K.M. College of Arts and Science (Kollam, India) and three Egyptian institutions, the National Research Centre (Cairo), October 6 University and Kafrelsheikh University, used silyl derivatisation and GC-MS to determine the composition of cashew nut oil.

Read More thumbnail image: Prior silylation aids cashew phenol separation

Multiple mango metabolites measured by GC-MS

Date: Sep 17, 2019

Author: Ryan De Vooght-Johnson

Commercial mango production often involves using artificial ripening agents, such as ethylene or calcium carbide, although the use of the latter reagent is banned in many countries. GC-MS was used to show differences in the metabolome caused by different ripening methods, enabling the method used to be determined from analysis of the fruit.

Read More thumbnail image: Multiple mango metabolites measured by GC-MS

Journal Highlight: Validation of an alternative method for the identification of 2‐dodecylcyclebutanone (2‐DCB) of irradiated meats by solid‐phase microextraction (SPME) gas chromatography–mass spectrometry (GC‐MS)

Date: Sep 17, 2019

Author: separationsNOW

A rapid and simple alternative to EN 1785:2003 has been proposed to detect irradiated meat containing fat based on HS‐SPME coupled with GC‐MS to determine the presence of the radiolytic product 2‐dodecylcyclobutanone.

Read More thumbnail image: Journal Highlight Validation of an alternative method for the identification of 2dodecylcyclebutanone 2DCB of irradiated meats by solidphase microextraction SPME gas chromatographymass spectrometry GCMS

Catching cucumber crop contamination with ECD determination

Date: Sep 2, 2019

Author: Ryan De Vooght-Johnson

The organophosphate insecticide ethion can be harmful to human health so residue levels on food crops need to be monitored. Researchers from the Sher-e-Kashmir University of Agricultural Sciences (Srinagar, India) used GC with an electron capture detector (ECD) to investigate ethion residue levels on cucumbers.

Read More thumbnail image: Catching cucumber crop contamination with ECD determination

Should you calibrate TD-GC by OLC or ILC?

Date: Aug 20, 2019

Author: Ryan De Vooght-Johnson

Thermal desorption GC is often used for the analysis of volatile compounds, but the accurate introduction of reference standards can be difficult to achieve. Researchers from the University of Leuven, Belgium, investigated the losses that can occur with offline liquid calibration (OLC) methods, also examining inline liquid calibration (ILC).

Read More thumbnail image: Should you calibrate TD-GC by OLC or ILC

Journal Highlight: Headspace solid‐phase microextraction gas chromatography–mass spectrometry for the detection of volatile organic compounds released from Ganoderma boninense and oil palm wood

Date: Aug 14, 2019

Author: separationsNOW

Headspace SPME-GC/MS and chemometric analysis have been used to analyse VOCs released from Ganoderma boninense cultures and infected oil palm wood to predict the onset of Ganoderma disease and help to study plant–pathogen interactions.

Read More thumbnail image: Journal Highlight Headspace solidphase microextraction gas chromatographymass spectrometry for the detection of volatile organic compounds released from Ganoderma boninense and oil palm wood
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