Hello, everyone: As the saying goes, food is the most important thing for the people. Pay tribute to you who are engaged in the cause of heaven. Testing instruments in food enterprises are an important means to ensure food safety and quality, so what kind of instruments are suitable for enterprise procurement? I think there are tens of millions of entrepreneurs, tens of thousands of elites and ordinary employees with four-digit incomes in the enterprise. But there is one thing in common: China people have yellow skin and black hair. However, once some enterprises purchase instruments, they take imported and domestic instruments as the standard to distinguish between good and bad instruments, while once they purchase domestic instruments, they are measured by absolute low prices, thus losing the purchase of high-quality and cost-effective instruments. This is a great loss for the enterprise. Here I will share the discussion with you in three points. Even if it is a brick to attract jade. 1 the difference between expensive and good instruments Some enterprises "money is not a problem, choose expensive ones to buy". Expensive, big-brand, large-scale instruments enrich the laboratory, resulting in high cost consumption, unbearable maintenance costs and low utilization rate. A large amount of cash turned into a vase for exhibition. This is not an admirable laboratory. 2 Choice and cost performance of big brands: the high price of big brands is their premium to the market, and buying big brands is the most convenient for specific buyers: the risk is small, you can show off, even if there are problems, you can shirk it. Over time, some laboratories have become exhibition halls of other people's brands, which actually dwarfs their own brands. Spend a lot of money to build other people's brands. In fact, enterprises need instruments that are suitable for their own scale and requirements, and in terms of cost, they need instruments with high cost performance. And this ability is necessary and difficult for enterprises. This puts forward higher requirements for purchasing personnel: performance, speed, quality, precision, price, brand, word of mouth and other issues come one after another. A laboratory with appropriate equipment, reliable quality, up-to-standard accuracy and low cost is respectable. 3 Requirements for instrument selection As users of instruments, their familiarity with instruments is generally not as good as that of merchants. So first of all, we should communicate with the merchants to get the performance and indicators of general instruments. It is difficult for buyers to judge because of the uneven ability and integrity of merchants. A pay special attention to some indicators that are obviously higher than those of ordinary enterprises, and pay more attention to the internal technical support of this indicator. If there is no internal technical support of the instrument, it is better to touch it less. B first of all, we should pay attention to the main indicators of the instrument, and don't be confused by the functions of some fancy gestures and ignore the attention to the main indicators. C pays attention to verifiable indicators and will give up for some bad enterprises. D. Pay attention to the internal and external environment in which the instrument is used: temperature, power consumption, reagents, catalysts, water, etc. And the adaptability of the materials used in the instrument to the environment is investigated. E avoid saying "most" about things you can't prove. Avoid the cheapest instrument, and it may make you buy the most expensive waste. These are some experiences of PEO Company in purchasing instruments. Next, I would like to talk to you about the application fields of Kjeldahl nitrogen determinator, that is, "Guide to Determinants of Nitrogen Selection": food, beverage, feed, grain and oil, dairy products, soil, fertilizer, animal husbandry, agricultural food, sewage treatment and biopharmaceuticals. . . . . What are the classifications of kjeldahl nitrogen determinator? Classification of nitrogen determinator: 1. Kjeldahl nitrogen determinator glass device (unsafe operation, narrow detection range) 2. Semi-automatic nitrogen analyzer (manually adding some reagents and automatically distilling) 3. Automatic nitrogen determinator (automatic addition of various reagents and automatic distillation) 4. Automatic nitrogen determinator (nitrogen determinator integrating distillation and titration to reduce human error). How does PEO guarantee these indicators? 1. measuring range: 0. 1-200mgn (PEO heating power 1500w, patented high-efficiency condenser tube) 2. The recovery rate is more than or equal to 99.5% (① Sealing: PEO nitrogen determinator adopts corrosion-resistant pipeline independently developed to ensure 3 years; ② Cooling effect: it adopts self-patented high-efficiency condenser pipe. If the condensation effect is not ideal, ammonia will escape) ③ Power: 800- 1500W (at present, the highest heating power in China is 750- 1500, which ensures the recovery rate of samples with high and low nitrogen content) ③ Whether the distiller is supplemented with water (PEO adopts double liquid level control (double safety) to eliminate the fear of dry burning). 1. The whole shell of the nitrogen determinator is rusted from the outside to the inside. (The use environment of nitrogen determinator is determined by strong acid, strong alkali, high temperature and high pressure. The shell of PEO nitrogen analyzer is made of high-performance ABS material for automobile, which will never rust. ) 2. The alkali pump of nitrogen determinator is prone to failure. (PEO nitrogen determinator adopts constant pressure alkali addition, which solves the problem of alkali pump corrosion even if the alkali addition amount is accurate. (3) Backwashing of distilled liquid of nitrogen determinator in the market occurs from time to time. (PEO nitrogen analyzer: All pipelines are pressure balanced to prevent distillate from flowing back. ) 4. Samples with high nitrogen content are inaccurate. (PEO's condenser tube is a patented high-efficiency condenser tube independently developed, which ensures the rapid cooling of distilled liquid with heating power above 1500w, thus ensuring the recovery rate of samples with high nitrogen content. The higher the heating power, the higher the nitrogen content of the detected sample, that is, the wider the measurement range).