- Food additive testing
According to relevant surveys, there are currently no less than 20 types of food additives in China, with a fine classification of over a thousand varieties. The use of food additives in food can not only change the appearance of the food, but also to some extent promote the extension of food preservation time or increase the nutritional value of the food. Preservatives, vitamins, colorants, etc. are common food additives. It is worth noting that excessive use of food additives can have a certain impact on human health. Therefore, China has clear regulations on the amount of food additives used, and accurate determination of additive content needs to be implemented during testing. Taking cured meat as an example, if the content of nitrate and nitrite exceeds the standard, it will form toxic substances with the meat, which is highly susceptible to the occurrence of related diseases, such as colon cancer. The implementation of food testing can prevent unqualified cured meat from entering the market. In addition, considering the diversity of food additives, it is difficult to fully list them, so common types were selected for analysis, as follows Sweetener detection. For food, the most common additive in its processing is sweetener, which can promote the sweetness of food and improve its taste. It is worth noting that the sweetness in many foods is produced after the application of sweeteners, and the dosage does not exceed the standard, which will not cause significant harm to the human body. Conversely, exceeding the relevant standards can endanger human health and even life safety. In the process of detecting food additives, attention should be paid to the selection of detection techniques. For example, liquid chromatography technology can be applied to the detection of food additives, which not only has high detection efficiency, but also can control the detection error within the minimum range (within 5%) Antiseptic testing. Adding an appropriate amount of preservatives to food not only prevents food decay, but also has a significant effect on maintaining food structure. Therefore, it has been widely used, commonly including potassium sorbate, sodium benzoate, etc. But if preservatives are used in excess, it can pose a threat to people’s health, so the amount of application should be controlled. In packaging products, the application frequency of preservatives is relatively high, and their main function is reflected in their ability to extend
Food shelf life, to avoid food spoilage and decay too quickly. In practical use, in order to fully utilize its effectiveness, it is necessary to strictly comply with relevant regulations and dosage to avoid exceeding a certain value, thereby ensuring people’s physical health. In actual testing, it is necessary to test the chemical composition of its food to ensure that the dosage of additives is controlled within a safe range Pigment detection. In various types of cuisine, their characteristics are reflected in their complete color, aroma, and taste, but some foods do not have corresponding colors. Previously, it was mentioned that in order to improve the aesthetics of food and increase consumers’ appetite, relevant personnel will adopt the method of adding pigments to achieve this. For pigments, they are mainly used in foods such as beverages and pastries. If its application dose does not exceed the standard, it will not have an impact on human health; Excessive use can lead to health problems.
- Nutrient testing
Generally speaking, there are many nutrients that maintain human life, and by providing energy to the body, the goal of maintaining human health can be achieved. Testing the nutritional substances in a certain type of food can provide scientific decision-making for people to choose food. Taking amino acids as an example, they can provide power for human movement. After detection, it can further understand the energy content of food and provide a reference for judging food safety. In the actual testing process, it is necessary to first process the tested samples, make relevant records, analyze internal and external standards, and achieve testing. For food testing, sugar is one of the key substances that can promote the increase of food energy. However, sugar has the characteristic of strong water solubility. In the detection, it is necessary to first exclude components unrelated to food samples or components that interfere with the detection. Through detection and analysis, the specific content of sugar in the sample can be grasped, improving the convenience of the detection. In addition, vitamins are also important nutrients for the human body. Reasonable testing can further understand and master substances that cover vitamins. Before conducting testing, extract vitamins from food, analyze their content, and judge their content according to relevant regulations to avoid the occurrence of vitamin imbalance in food.
- Hazardous substance detection
Against the backdrop of continuous improvement in people’s quality of life, high demands have been placed on the quality of agricultural products and crops. However, during the growth process of crops, in order to ensure their production yield, organic fertilizers and pesticides are often used, causing harmful substances to remain in agricultural products or crops, posing a threat to people’s health and even life safety. For organic fertilizers and pesticides, most of them are polar substances, which are difficult to decompose due to factors such as high molecular weight and poor thermal stability, which to some extent increases the difficulty of detection. Taking veterinary drug residues as an example, it mainly refers to the presence of drug residues or secondary metabolites in the edible tissues of edible animals after certain drug treatments, commonly including antibiotics. Some studies have pointed out that fluorescence detector liquid chromatography can detect the residue of quinolone antibiotics in aquaculture areas, and during this period, solid phase extraction method and other methods can be used to achieve sample processing. The sensitivity of this detection method is high, which can provide assurance for the reproducibility of the experiment and effectively ensure the detection efficiency and quality.