Is there any multi function digestion instrument that can achieve error free?

After more than ten years of unremitting efforts, "Yiyao Technology" has become a leader in the field of microwave chemistry and sample preparation in China. In 2001, the first self-developed "temperature and pressure dual control" WX-2000 microwave digester was launched. In 2005, two microwave digesters, WX-8000 and Excel, which "have industrial-grade microwave resonators", were launched; In 2008, the first NOVA "single-mode microwave synthesizer" in China was launched; In 2010, the "touch intelligent microwave digestion instrument" and raptor "microwave high temperature furnace" were launched; In 2011, the first Q2 "microwave moisture analyzer" in China was launched; In 2012, it launched the dual-screen display industrial-grade TOPEX "all-round microwave chemical work platform"; In 2013, the EXTRA "automatic solid phase extractor" was launched; In 2014, the Clever "Automatic Solid Phase Extractor" was launched; In 2015, the N1 was launched....

OK. Shenchanghong multi-function digestion instrument has multi-point error-free calibration to achieve zero-error measurement at set points, which completely eliminates the error caused by the nonlinearity of temperature sensors in common digesters on the market.

The multi-functional COD digestion instrument is a highly intelligent product, which has been carefully developed and introduced to the market. Our products can withstand the test of the market and meet the relevant national standards. The digestion device can improve the work efficiency, and it works to make the product have better characteristics.

When we use it, it becomes the ideal digestion instrument for us.

The multi-function COD digester adopts digital setting, display heating temperature, automatic control of heating temperature, and can set heating time. The heating speed is fast, the temperature is constant and uniform, the power consumption is small, the operation is simple, the performance is stable and reliable, and it is widely used in water quality testing in environmental protection, medical treatment, health, food, tap water, papermaking, sewage treatment, printing and dyeing, petrochemical, metallurgy, colleges and universities and other industries. The instrument can realize the chemical analysis and digestion function of COD, total phosphorus, total nitrogen and total chromium in various water samples such as surface water, industrial wastewater, domestic sewage, etc.

The multi-function COD digester can place 20 reaction tubes with a diameter of 16 mm at the same time, and automatically control the temperature according to the finalized digestion temperature and digestion time.

This instrument can realize the chemical analysis and digestion function of COD, total phosphorus, total nitrogen and total chromium of various water samples that require heating process. 20 16mm reaction tubes can be placed at the same time, and the temperature can be automatically controlled according to the set digestion temperature and digestion time.

This dissolver dragon elimination. It is a temporary symptom. It cannot be cured. He treats the surface but not the root cause, and if it is a disease, it is better to go to the hospital.

It is recommended that you use the multi-functional CNC digestion instrument of Shenchanghong Technology, which can put 16-20 reaction tubes with a diameter of 16mm at the same time (different models can be placed in different quantities at the same time), which can meet your needs of digesting multiple water samples at the same time.

Automatic timed digester.

When the digestion tube bursts, do not panic, first cut off the power of the instrument, after the temperature of the digester is reduced, take out the glass slag with tweezers, and then clean the digestion hole with a metal rod or sandpaper, and use it again after cleaning.

Error refers to the degree of difference between the indicated value of the meter and the actual value being measured. The magnitude of the instrument error can be expressed in three forms: absolute, relative and referential.

Yes, the water sample needs to be digested with a digestion instrument before being detected by a COD analyzer. You can buy Shenchanghong's tester, the product is directly equipped with a digestion instrument, and Shenchanghong digestion instrument has multi-point error-free calibration to achieve zero error measurement of the set point, completely eliminating the error caused by the nonlinearity of the temperature sensor of the common digester on the market, and the water quality detection is more stable.

The standard COD digestion instrument is used with the COD tester, and it must be digested to do COD, and the COD instrument that does not digest is not recommended to be used, and it is not allowed. When buying a standard COD digester and a COD tester, buy a separate one, it is not recommended to buy a conjoined one, and now many manufacturers have made it one, which is not in line with the national standard method.

The COD tester and COD digester are actually a set of instruments, both of which are professional equipment for the determination of chemical oxygen demand.

The COD tester usually includes a digestion instrument, but professional laboratories generally refer to the COD tester as the host of the COD tester, which is mainly used for colorimetry, drawing curves, and reading values.

The COD digestion instrument is a heating device, the water sample is packed in a glass test tube, and then put into the digestion hole of the digestion instrument to digest to promote the chemical reaction, and after the reaction is completed, the water sample test tube is taken out, and then put into the host to read the value.

The temperature and time of different digesters are different, so it depends on the instrument chosen. The digestion of water samples is divided into wet digestion method and dry decomposition method, wet type (nitric acid digestion method, nitric acid-perchloric acid digestion method, nitric acid-sulfuric acid digestion method, sulfuric acid-phosphoric acid digestion method, sulfuric acid-potassium permanganate digestion method, multiple digestion method, alkali decomposition method); Dry type (dry ashing method). I don't think it is suitable to determine the digestion of COD, the wet digestion method is basically acid or alkali, the oxidation of acid is very strong, so it will decompose most of the organic matter, and the dry ash method will also decompose the organic matter, which is definitely not feasible.

So it's better to choose a specialized digestion instrument.

**It is definitely that the COD tester is cheap, and the difference between the general water is not very big, and the two are about the same.

The COD tester must be matched with the digestion instrument, at present, the tester and the digestion instrument are separated, and there are also integrated, it is recommended to buy a separate one. At present, there are many brands on the market, I think we use Xi'an Yingrun environmental protection COD tester is not bad, its digestion instrument has multi-point error-free calibration, accurate measurement, high cost performance, I personally think it is still very good.

1. The difference between the indicated value A of the absolute error instrument and the actual value AO to be measured is called absolute error, that is: the unit of absolute error is the same as the unit being measured, and the sign of absolute error is positive and negative. When calculating, the standard table indicates the value as the actual value to be measured.

Graphite is used as the heating body, and the temperature control accuracy can be Noted.

The temperature is uniform, and the temperature difference between each digestion well can be Noted, so as to ensure the consistency of digestion.

Isostatically pressed graphite plates prevent the erosion of highly corrosive substances and thus guarantee a long service life. The overall structure adopts anti-corrosion design to adapt to various harsh environments.

Corrosion-resistant properties reduce sample contamination.

The length of digestion time can be set freely according to the type of sample and processing method.

Ten heating and heating steps can be set in each step, and the heating and holding time can be set in each step, which can be flexibly configured to handle difficult-to-digest samples. And make a method library for easy maintenance.

Temperatures are controlled from room temperature to 450 °C and overheat protection is included.

The main function is heating. To provide a suitable temperature environment for digested samples, it is a special function of the electric furnace.

What is the COD in a water sample? If it's tens of thousands, it's nothing, and this kind of instrument itself is to increase speed at the expense of accuracy.

In addition, if the error is too large, your water is not suitable for this method.

If you have to use it, you can take a water sample (I don't know how much to sample. Try to take a container first, mix well and then evenly divide into parallel samples, so as to avoid the error caused by the difference between the upper and lower SS) Consider it properly. Spectrophotometry requires that the digested sample be uniformly transparent and free of impurities (as you think), you can dilute the digestion sample and take the supernatant for colorimetric measurement.

Did you do it with a spectrophotometer? This stability is very poor, but it is very convenient, in the absence of regularity, it is better to use less, this is not the way, even if the supernatant is taken, it will be poor white suspended solids, or use ordinary chemical methods or other instruments are better.

When I use a microwave digestion device to measure COD, the parallelism error is large, up to 100 200mg L, what is the reason?

There are a lot of suspended solids in the water sample, and the upper liquid taken after a period of precipitation during sampling is WXJ-III microwave digestion instrument, what are the reasons for this error?

But how can we reduce its volatility? What are the details to keep an eye on? Now I can only do this method when I go to work, and I hope that the fluctuation will be a little less.

It felt like it had not been digested well, and some of the undissolved samples had jumped onto the outer wall of the digestive tube and carbonized.

The protein of the feed has been digested into green, but there is still something black on the middle wall of the tube.