Test items are as follows: The total number of colonies of coliforms microbial detection of Salmonella Shigella Staphylococcus aureus, Vibrio parahaemolyticus, Bacillus cereus yeast fungi physical and chemical testing nitrite oil acid value, peroxide value oil price volatility of iodine salt nitrogen preservative: sorbic acid, benzoic acid pesticide residues in vegetables (rapid detection) Food heavy metals - lead, arsenic, cadmium