[Nutritional components of 5 potatoes in Anqing City in 2021].

Objective: To analyze the nutrient composition and nutritional value evaluation of 5 potatoes in Anqing City.

Methods: According to the requirements of the Technical Manual for Food Composition Monitoring Projects, 5 types of potato samples were collected from Anqing City, Anhui Province. National standard detection method were used to determine the nutritional components such as water, ash, protein, fat, dietary fiber, sugar, minerals, vitamins, and amino acids in the samples.

[Comparison of fat determination methods and analysis of fatty acids in tea].

Objective: Comparative analysis of two method for determining fat and analysis of fatty acid content in tea samples.

Methods: The content of freefatand total fat in tea was determined by Soxhlet extraction method and acid hydrolysis method, and the content of fatty acids were determined by gas chromatography. The composition and content of fatty acids in 21 tea samples from 5 regions were analyzed.

[Simultaneous determination of seven quaternary ammonium compounds in frozen food by ultra performance liquid chromatography-tandem mass spectrometry combined with modified QuEChERS method].

Quaternary ammonium compounds (QACs) are a class of cationic surfactants that can be used as the main active ingredient of disinfectants. The increased use of QACs is concerning as exposure from inhalation or ingestion to these compounds that has been associated with adverse effects on the reproductive and respiratory systems. Humans are exposed to QACs primarily by food consumption and inhalation of air.

[Simultaneous determination of beauvericin and four enniatins in eggs by ultra-performance liquid chromatography-tandem mass spectrometry coupled with cold-induced liquid-liquid extraction and dispersive solid phase extraction].

Enniatins (ENNs) and beauvericin (BEA), known as emerging mycotoxins, are the toxic secondary metabolites produced by various species. Most grain and grain-based products are contaminated with ENNs and BEA. Animals have been exposed to ENNs and BEA primarily due to consumption of cereal grains and cereal by-products.

[Application of isotope dilution-liquid chromatography-tandem mass spectrometry in the preparation and certification of reference material of tenuazonic acid and tentoxin in wheat flour].

A method for the preparation and certification of the reference material of tenuazonic acid (TeA) and tentoxin (TEN) in wheat flour was developed. This method provided methodological references to develop of standard material for analyzing alternaria toxins in grains. The wheat flour reference materials were based on wheat grains which were naturally contaminated with alternaria toxins.