Xu, Ziyan published the artcileProcessing of flavor-enhanced oils: optimization and validation of multiple headspace solid-phase microextraction-arrow to quantify pyrazines in the oils, HPLC of Formula: 14667-55-1, the main research area is rapeseed oil flavor pyrazine solid phase microextraction; flavor edible oil; internal standard method; multiple headspace solid-phase microextraction; pyrazine; solid-phase microextraction-arrow.
An efficient and effective multiple headspace-solid phase microextraction-arrow-gas chromatog.-mass spectrometry (MHS-SPME-arrow-GCMS) anal. protocol is established and used to quantify the flavor compounds in oils. SPME conditions, such as fiber coating, preincubation temperature, extraction temperature, and time were studied. The feasibility was compared between SPME-arrow and the traditional fiber by loading different sample amounts It was found that the SPME-arrow was more suitable for the MHS-SPME. The limit of detection (LODs) and limit of quantitation (LOQs) of pyrazines were in the range of 2-60 ng and 6-180 ng/g oil, resp. The relative standard deviation (RSD) of both intra- and inter-day were lower than 16%. The mean recoveries for spiked pyrazines in rapeseed oil were in the range of 91.6-109.2%. Furthermore, this newly established method of MHS-SPME-arrow was compared with stable isotopes dilution anal. (SIDA) by using [2H6 ]-2-methyl-pyrazine. The results are comparable and indicate this method can be used for edible oil flavor anal.
Life (Basel, Switzerland) published new progress about Equilibrium. 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, HPLC of Formula: 14667-55-1.