What items are tested in the food enterprise laboratory?

What items are tested in the food enterprise laboratory?

(1) Quality project

Including: moisture, salt content, sugar content, protein content, fat content, fiber content, vitamin content, acidity and the like. For the testing of these items, if the funds are limited, chemical analysis can be used. It is only necessary to configure the simplest oven, water bath, electric furnace, agitator, pulverizer, pH meter and other equipment.

If the funds are sufficient or there are more inspection batches, the corresponding testing items have corresponding special instruments available for purchase. In addition, there are some general-purpose instruments available for purchase, such as UV/Vis spectrophotometer, near-infrared analyzer, and automatic titrator. Fluorescence photometers are sometimes required to detect vitamins A and E. Detecting nutrient elements such as calcium, zinc, iron, etc., can purchase an atomic absorption meter-flame detector.

(2) Health project

Including: microorganisms, additives, harmful elements, pesticide residues, veterinary drug residues, toxins, etc. For general food companies, microbiological testing laboratories should be built.

a) microorganism

The microbiology laboratory should be constructed in accordance with the requirements of the biological laboratory standards. The necessary equipments include clean benches, incubators, autoclaves, electric stoves, etc. Other equipment is configured according to specific test items. If you have less money, you can buy it domestically. If you have more money, you can consider buying it. The price difference between the two is quite different.

b) Additives and harmful elements

Some projects can use chemical methods such as nitrite, sulfur dioxide, heavy metal content, total arsenic, and the like. However, in order to meet the food hygiene requirements of the current national standard, you should purchase a gas chromatograph-hydrogen flame detector, liquid chromatography-ultraviolet/visible light detector, such general preservatives (benzoic acid, sorbic acid, etc.), sweeteners (sweet Pigments, sodium saccharin, etc., pigments (lemon yellow, carmine, etc.) can be detected. Purchase of atomic absorption spectrometer - graphite furnace detector, can detect harmful elements such as lead, chromium, cadmium, copper, nickel, etc., and also need an atomic fluorescence instrument to detect arsenic and mercury.

c) Residual pesticides

The detection of residual pesticide gas chromatography is indispensable. For the detection of organochlorine pesticides, an electron capture ECD detector is required; for the detection of organophosphorus pesticides, a flame photometric FPD detector or a nitrogen-phosphorus NPD detector is required. Nowadays, there are more and more projects for pesticide residue detection. To improve versatility, it is recommended to install a capillary column split/splitless inlet and install a capillary column. Compared with traditional packed column columns, capillary column analysis has many projects and good resolution, which can reduce frequent column changes and improve analysis efficiency. There are more and more pesticide residues to be tested when exporting food processing enterprises. In order to control the quality of raw materials and products, gas chromatography-mass spectrometry can be configured. Generally, only the electron bombardment EI source is configured, and if necessary, a negative chemical NCI source can be provided. Whether to choose quadrupole mass spectrometry or ion trap mass spectrometry, I think it is ok, both instruments have their own advantages and disadvantages. Still depends on the specific work.

d) residual veterinary drugs

If the detection of residual veterinary drugs is carried out, there are not many items and there are many batches. It is conceivable to configure an enzyme-linked immunosorbent instrument. The instrument has little input at a time, is easy to operate, and has high detection sensitivity.

There are some disadvantages to using ELISA. First, the kit is a long-term consumable. If the batch is low, the cost will be higher. Second, the specificity is not good, there may be false positives. Third, if it is for a relatively long period of time. There are many inspection items, and the cost is even higher than the instrument analysis.

For export food enterprises with a certain scale, in order to meet the current limit requirements of the European Union, the United States, Japan and other developed countries, it is best to configure a liquid chromatography-tandem mass spectrometer.

The first instrument is recommended to be equipped with a triple quadrupole mass spectrometer with high sensitivity and good reproducibility. The instrument does not have to pursue high configuration, enough to use, but the sensitivity, stability, anti-pollution and other performance is better. It is best to buy a model with more users, and a user group similar to the one that is tested by itself. First, it indicates that there is no problem in the project to be tested by the model, and secondly, it is convenient for future technical exchanges.

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Leo Group Company is the largest and most powerful technology manufacturing enterprise. Our production line including refrigerated milk cooling tanks, milk storage tanks, milking machines. Road Milk Tanker and TMR feed mixers. LEO Group which restructured by a former military enterprise in 1999, and gradually developed into a research and development, design and manufacturing, sales and engineering, installation and service in an integrated group of companies, becomes the China Dairy Industry Association member units, the Ministry of Agriculture in 2009 was listed as agricultural subsidies sentinel the enterprises.

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