Recently, the Ministry of Public Security unifiedly commanded public security organs in Zhejiang, Shandong, Henan and other places to crack a series of cases involving the use of gutter oil to produce and sell edible oil for the first time, destroying the “gutter oil” criminal network involving 14 provinces and destroying production and sales. 6 "Black Factory" and "Black Nest". However, according to the survey, 10,000 tons of drain oil has flowed to the table. In order to cooperate with the work of the regulatory authorities, Agilent Technologies has introduced a test method for waste oil (commonly known as "ditch oil") in restaurants and kitchens.

At present, the main difficulties in analyzing oils and fats are: there are many kinds of oils and fats, the main components of different oils and fats are not significantly different; multiple edible oil production processes coexist; the quality control of raw materials and finished products of edible oil production; Non-standard use of grease. In response to the difficulties in oil and fat testing, Agilent has introduced methods such as LC, GC / MS and LC / QTOF, which can meet the multi-faceted needs of oil and fat testing:

1. LC method:

It is mainly used for the separation of triglycerides; the types of oils and fats can be preliminarily distinguished; according to the signal at 240nm or higher, the oxidation of oils and fats can be judged and the "hala oil" can be distinguished;

2. LCQTOF analysis method:

Mainly used for the analysis of triglycerides; the triglyceride database can be searched according to the accurate quality, and the fatty acid type can be guessed from the secondary spectrum; the statistical analysis of the accurate quality can help to judge the different types and different qualities of oils and fats;

3. GCMS analysis method:

It is mainly used for the analysis of non-triglyceride components in oils and fats; based on the results of a database search of special components, it can effectively determine the type or composition of oils and fats; the statistical analysis of GCMS data helps to determine the different types and quality of oils.

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