Thermal desorption inverse-voltage low temperature plasma ionization source mass spectrometry for detection of phthalates in food was written by Shen, Zeyue;Xu, Wen;Zhang, Junliang;Zhang, Tengyu;Zhan, Yuxing;Yu, Jiancheng;Tang, Keqi. And the article was included in Fenxi Shiyanshi in 2022.Formula: C20H26O4 This article mentions the following:
Based on low temperature plasma, a set of thermal desorption inverse-voltage low temperature plasma ionization (TD-iLTPI) device was designed and fabricated. TD-iLTPI device is composed of a thermal desorption module and an ionization source module integrated on a π-type four-way tubing. Sample probe is inserted into the thermal desorption module to vaporize the sample after sample loading, and then the sample enters the ionization area with the carrier gas to be ionized. The needle electrode in iLTPI is connected to a.c., and the outer ring electrode is grounded. The electrode method is opposite to that of LTP. In this paper, the parameters of the TD-iLTPI-MS were optimized with 12 representative phthalates as the analytes, the performance of TD-iLTPI-MS was investigated, and the TD-iLTPI-MS was applied to test actual samples containing phthalates. The results showed that the standard curve of BBP had good linearity (R2=0.9958), the recoveries were 89.7%-116.8%, and the relative standard deviations were 4.5%-8.2%. The detection limit of phthalates was also far lower than that using other ambient ion sources. The developed method was used for fast screening of phthalates in liquor, fruit juice, bread, cheese and butter, and quant. determination of BBP in juice. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Formula: C20H26O4).
Dicyclohexyl phthalate (cas: 84-61-7) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Formula: C20H26O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics