Nanjing Binglab Intelligent microwave digestion instruments make sample pretreatment more efficient

A complete sample analysis process, from the beginning of sampling to writing the analysis report, can be roughly divided into 4 steps:

1. Sample collection;

2. Sample pretreatment;

3. Analysis and determination;

4. Data processing and reporting of results.

According to statistics, the four steps accounted for 6% of the total analysis time: sample collection 6%, sample pretreatment 61%, analysis and determination 6%, data processing and reporting 27%. The time required for sample preparation accounts for two-thirds of the total analysis time.

The time spent on sample preparation is almost an order of magnitude more than the time required for the analytical testing of the sample itself. Therefore, the study of sample pretreatment methods and techniques has attracted the attention of analytical chemists, and the exploration and research of various new technologies and methods has become one of the important topics and development directions of contemporary analytical chemistry. The fast, simple and automatic pretreatment technology not only saves time and effort, but also reduces the errors caused by different personnel operations and multiple transfers of samples, while avoiding the use of a large amount of organic solvents and reducing environmental pollution. The in-depth study of sample pretreatment technology will play a positive role in promoting the development of analytical chemistry.

At present, microwave digestion instruments on the market also have more or less defects:

1. The sampling volume of a single sample is too small

2. The number of samples digested at one time is too small

3. The temperature and pressure are still not high enough

4. Many insoluble samples still cannot be completely digested

5. Security design is still not perfect

Some magazines count more than 1,000 laboratories, but many laboratories with modern analytical instruments still use ancient and cumbersome sample pretreatment methods. Sample pretreatment has become the bottleneck in modern analysis, which seriously hinders the analysis work. Therefore, in order to improve the efficiency, the problem of sample pretreatment must be solved.

With years of experience in research and development of sample pretreatment products, Nanjing Binglab technicians have created a sample pretreatment product – intelligent microwave digestion instrument, which can quickly help laboratory personnel process samples, greatly shorten experiment time and improve work efficiency.

Nanjing Binglab microwave digestion instrument can assist AAS, AFS, ICP, ICP-MS elemental analysis and digestion before analysis of GC, HPLC, GCMS, etc., and can complete the processing of most samples within about 20 minutes. Such as digestion, extraction, proteolysis, concentration, drying and organic synthesis.

Aiming at the problem of small batch digestion volume of microwave digester, Nanjing Binglab has launched four models with different processing capacity: MD-I model (8 digits), MD-II (16 digits), MD-III (24 digits), MD-IV(40 digits)for laboratories to choose according to the needs of experimental samples .

For the accuracy of digestion, the Nanjing Binglab microwave digestion instrument adopts a non-contact infrared temperature measurement system to monitor the temperature of the whole tank in real time, and can directly measure and directly display the temperature of the sample solution inside each digestion tank in real time.

Sample digestion is inseparable from the use of strong acid or mixed acid, and microwave digestion generally adopts a closed high temperature and high pressure method to speed up the digestion process, which undoubtedly increases the safety hazards of the sample pretreatment process. Therefore, safety is an indicator for examining microwave digestion equipment. Our microwave digestion instrument takes active safety precautions through the following measures:

1. Microwave source:2450MHz,dislocation arrangement of double magnetrons,0-1600W non-pulsed continuous microwave output, high-frequency closed-loop feedback control;

2. Microwave resonator:56L large volume 304 stainless steel cavity, using seamless welding process,6-layer Teflon coating spray;

3. Blast door: multi-layer explosion-proof, microwave shielded door;

4. Temperature measurement and control system: 0~300°C measurement range, measurement accuracy is ± 1 ℃ (infrared),and ± 1 ℃ control stability.

As an advanced sample pretreatment method, the microwave digestion of Nanjing Binglab microwave digestion instrument has the advantages of faster heating speed, uniform heating, less reagent consumption, and low blank than traditional electric heating plate digestion. Especially in the analysis and detection of volatile elements, the integrity of the sample can be well maintained, and the sample recovery rate is very high. At present, it has been widely used in food, textile, geology, metallurgy, plastics, coal, cosmetics, petrochemical, biomedicine, environmental monitoring, sewage treatment, battery manufacturing and other fields.