Detection of Adulterated Vegetable Oils Containing Waste Cooking Oils Based on the Contents and Ratios of Cholesterol, β-Sitosterol, and Campesterol by Gas Chromatography/Mass Spectrometry

2015 ◽  
Vol 98 (6) ◽  
pp. 1645-1654 ◽  
Author(s):  
Haixiang Zhao ◽  
Yongli Wang ◽  
Xiuli Xu ◽  
Heling Ren ◽  
Li Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Vegetable Oils ◽  
Waste Cooking Oil ◽  
Gas Chromatography Mass Spectrometry ◽  
Quick Method ◽  
Cooking Oil ◽  
Waste Cooking Oils ◽  
Cooking Oils

Abstract A simple and accurate authentication method for the detection of adulterated vegetable oils that contain waste cooking oil (WCO) was developed. This method is based on the determination of cholesterol, β-sitosterol, and campesterol in vegetable oils and WCO by GC/MS without any derivatization. A total of 148 samples involving 12 types of vegetable oil and WCO were analyzed. According to the results, the contents and ratios of cholesterol, β-sitosterol, and campesterol were found to be criteria for detecting vegetable oils adulterated with WCO. This method could accurately detect adulterated vegetable oils containing 5% refined WCO. The developed method has been successfully applied to multilaboratory analysis of 81 oil samples. Seventy-five samples were analyzed correctly, and only six adulterated samples could not be detected. This method could not yet be used for detection of vegetable oils adulterated with WCO that are used for frying non-animal foods. It provides a quick method for detecting adulterated edible vegetable oils containing WCO.

scholarly journals Determination of Phytosterols in vegetable oils by GC-MS method

2020 ◽  
Vol 3 (4) ◽  
pp. 36-42
Author(s):  
Hien Dang Thu ◽  
Ngoc Anh Mai Thi ◽  
Hong Ngoc Nguyen Thi ◽  
◽  
◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Vegetable Oils ◽  
Limit Of Detection ◽  
Alkaline Media ◽  
Gas Chromatography Mass Spectrometry ◽  
Limit Of Quantification ◽  
Chromatography Mass Spectrometry ◽  
Trimethylsilyl Ethers

In this study, a method for determination of six phytosterols by gas chromatography-mass spectrometry with derivatization in vegetable oils was validated. The samples were hydrolyzed in an alkaline media at 70°C for 60 min. Then, the samples were performed liquid-liquid extraction with toluene. The phytosterols are derivatized to trimethylsilyl ethers and then analyzed by gas chromatography-mass spectrometry. The limit of detection and limit of quantification was 5 and 15 mg/kg, respectively. Recoveries of six phytosterols were between 93.5% and 101%.

Simultaneous determination of tocopherols and tocotrienols in vegetable oils by GC-MS

2016 ◽  
Vol 8 (40) ◽  
pp. 7341-7346 ◽  
Author(s):  
Rui Zhang ◽  
Weijian Shen ◽  
Xueyuan Wei ◽  
Feifang Zhang ◽  
Chongyu Shen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Vegetable Oils ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

A simple and rapid gas chromatography-mass spectrometry (GC-MS) method was developed and validated for the simultaneous determination of α-, β-, γ- and δ-tocopherols and α-, β-, γ- and δ-tocotrienols in vegetable oils.

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