Formaldehyde detector
It is suitable for continuous on-line detection of formaldehyde concentration and on-site sound and light alarm in various industrial environments and special environments. It plays an early warning role on the safety of hazardous sites. The instrument adopts imported electrochemical sensors and microcontroller technology, which has signal stability and accuracy. High and repeatable, the explosion-proof wiring is suitable for all kinds of dangerous places. The instrument is compatible with various control alarms, PLC, DCS and other control systems. It can realize on-site alarm and remote monitoring and alarm functions at the same time, and realize semi-quantitative rapid realization of formaldehyde in indoor air. The structure is simple, small in size, easy to carry and intuitive. of. It can be widely used for on-site quantitative and qualitative detection of formaldehyde in the air in living rooms, indoors, residential areas, public places, living places and factories and mines.
working principle
The formaldehyde detection instrument adopts the principle of electrochemical sensor, combines the single-chip technology and the network communication technology to collect the air sample from the detection site. The formaldehyde in the air is absorbed by the phenol reagent solution, and the reaction produces a azine. The azine is formed by the high-iron ion oxidation of the chromogenic agent in the acidic solution. Blue-green compound. Direct colorimetric determination at the scene based on color depth.
Since the detection value of indoor pollution has a great relationship with the temperature, humidity, and pressure of the detection environment, according to the normal detection, the detected value often deviates from the expected one.
Precautions
1. The test water must be distilled water deionized water or purified water.
2. Bubble absorption bottle and do not connect to the air inlet hole, otherwise it will cause reverse suction, damage the instrument! Loss absorption liquid.
3. All glassware should be cleaned with acid wash, tap water and distilled water in the chemical laboratory before the first use.
4. After each test, the bubble should absorb the colored solution in the bottle in time, and then clean it with acid washing solution, tap water and distilled water.
Product qualification
The indoor air detector formaldehyde detection reagent is designed according to the national standard GB/T18204.26-2000 "Phenol reagent colorimetric method for determination of formaldehyde in public places", and has been configured as a standard reagent for direct use.
The instrument can detect six pollution indexes of formaldehyde, benzene, ammonia, toluene, xylene and TVOC in indoor air, and can test 6 items at the same time. It can be widely used in environmental protection, construction, decoration, supervision and other companies to carry out indoor air quality testing business, and can also be used for daily research and teaching activities of research institutes.
Research status
In analytical chemistry, spectral analysis still occupies an important position, and the spectrophotometric method for formaldehyde determination is retained in national standard methods in many countries. Fifteen laboratories in three regions of the United States, Europe and Japan have consistently recommended the use of phenol reagents to detect formaldehyde levels in vaccines. In many field applications of practical applications, photometry is still a reliable, simple and economical method. Spectrophotometry or its improved method still plays an important role in formaldehyde monitoring methods. The new method of high sensitivity, good selectivity and continuous real-time monitoring in the field is the direction of its efforts.
The application of chromatographic techniques in formaldehyde monitoring will continue to grow with its own development. In a long time, chromatographic methods are still the most effective means to solve the simultaneous separation and analysis of complex components. On the instrument side, on-site analytical instruments will undoubtedly dominate. It is the most representative direction in the development of formaldehyde monitoring instruments. However, this does not mean that the laboratory's formaldehyde measuring instrument equipment will withdraw from the historical stage. In short, the development of new methods and new instruments with high sensitivity, good selectivity and on-site analysis or long-term stable real-time online monitoring will be an important direction for formaldehyde monitoring in the air.
Beijing Heng Aode Instrument & Meter Co., Ltd. specializes in water quality detector, coating thickness gauge, soil pulverizer, tempered glass tester, water quality tester, PM2.5 tester, inhalable particulate matter detector, high frequency heat sealing machine, Strain control triaxial apparatus, milk somatic cell detector, helium gas concentration detector, soil moisture conductivity tester, field strength meter, collection box, color ratio measuring instrument, capillary water absorption time measuring instrument, oxidation reduction potentiometer Instrument, carbon monoxide carbon dioxide detector, CO2 analyzer, oscillopolarograph, slime content tester, car starter power supply, automatic potentiometric titrator, portable thermometer, zirconia analyzer, reed switch tester, precision conductance Rate meter, TOC water quality analyzer, microcomputer plasticity measuring instrument, the company adhering to the "customer first, forge ahead" business philosophy, adhere to the "customer first" principle to provide our clients with quality services. Welcome patrons!
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