[Determination of each single component vegetable oil in blend oil by headspace gas chromatography-mass spectrometry].

Objective: A method of headspace gas chromatography-mass spectrometry was established for the determination of the content of each single component vegetable oil in blend oil based on soybean oil, peanut oil and sesame oil.

Methods: The data of volatile components of each single component vegetable oil was collected effectively by headspace gas chromatography-mass spectrometry. The data was compared, filtered step by step and evaluated by method ology using chemometrics method and group analysis software.

[Identification of odorous components in drinking water using headspace-gas chromatography-time-of-flight mass spectrometry].

The odorous compounds in drinking water were identified and analyzed by using headspace-gas chromatography-time-of-flight mass spectrometry (HS-GC-TOF-MS) combined with differential analysis software. The number of compounds were reduced by step-by-step screening of mass spectrometry data and statistical analysis of -test and fold change wherein significant differences in compounds were observed. Further, the structural analysis method was used which revealed that the odorous component present in drinking water is acetaldehyde.

[Determination of olive oil content in olive blend oil by headspace gas chromatography-mass spectrometry].

A method for the determination of the content of olive oil in olive blend oil by headspace gas chromatography-mass spectrometry (SH-GC/MS) was established. The amount of the sample, the heating temperature, the heating time, the amount of injection, the injection mode and the chromatographic column were optimized. The characteristic compounds of olive oil were found by chemometric method.

[Determination of three exogenous plant hormone residues in bean sprout by high performance liquid chromatography-quadrupole-time of flight mass spectrometry].

This study was aimed to the establishment of an analytical method for the determination of three exogenous plant hormone residues in bean sprout by high performance liquid chromatography-quadrupole-time of flight mass spectrometry (HPLC-Q-TOF-MS). The target compounds were gibberellins, 6-benzylaminopurine and parachlorophenoxyacetic acid. The QuEChERS (quick, easy, cheap, effective, rugged, and safe) method was used for sample preparation.

Effects of crop development on the emission of volatiles in leaves of Lycopersicon esculentum and its inhibitory activity to Botrytis cinerea and Fusarium oxysporum.

Volatiles emitted from the leaves of Lycopersicon esculentum at the two-, ten-leaf and anthesis periods were collected by a gas absorbing method and analyzed by gas chromatography (GC)-mass spectrometry. In total, 33 compounds of volatiles emitted from three developmental stage plants were separated and identified, and quantitatively analyzed by the internal standard addition method. All of the samples of volatile were found to be rich in monoterpenes and sesquiterpenes.