Introduction: The GMA3376 is the latest generation of products that utilize gas-phase molecular absorption spectroscopy for specific analytes in water. At present, the instrument is mainly used for the determination of nitrite, nitrate, total nitrogen, sulfide, ammonia nitrogen, Kjeldahl, mercury and sulfite, the application of analytical methods from the Ministry of Environmental Protection to develop standard methods. Features: 1. Instrument analysis speed, testing a project requires only 42S of the entire process; 2. Instrument Analysis Anti-interference ability, almost no pretreatment, because it is not suspended in the water, color and impurity ions interfere; even if the water smelly black did not affect. 3 samples automatically draw, automatic analysis, automatic analysis report. 4. The instrument is equipped with online heating system, the analysis of nitrite and total nitrogen without the help of tedious heated water bath heating, saving analysis time 20 to 30 minutes, greatly improving the efficiency of the analysis. 5.Operation is very simple, due to the high degree of automation technology integration, the use of the device, the analyst skills are not critical, newcomers can be used as well. 6. Do not use any desiccant. Technical Parameters: 1. Optical and detection system:
① wavelength by the computer automatically adjust the wavelength accuracy ≤ 0.2nm, wavelength repeatability ≤ 0.1nm;
② lamp position automatically switched by the computer, up to 4 lights preheat, actually only need to use three lights, the fourth lamp is a spare lamp; the computer automatically adjusts the lamp to the most suitable position;
③ lamp current is automatically adjusted, and memory function, to ensure the most appropriate lamp energy;
④ slits 0.1,0.2,0.4,1.0 nm passband passband four adjustable, the determination of different projects or different concentrations of samples, the optimal choice of the appropriate slit to improve the analysis sensitivity and anti-interference ability;
⑤ instrument stability is very strong, fully warmed, the stability of more than 24 hours;
⑥ reliable performance, all the core components imported, including chips, flow controllers, etc .;
⑦ detector for the photomultiplier tube, the selection of Japanese Hamamatsu imported products, stable performance. 2. Injection and reaction separator system:
① samples and reagents automatically draw, without using pipette and quantitative sampler and other auxiliary equipment;
② imported polymer gas-liquid separation membrane, gas-liquid separation efficiency of 99.99%; because there is no direct contact with the liquid, so no need to change;
③ using 2.4mm large diameter injection tube to ensure that the sampling representative;
④ The reaction system is always sealed, reagents and samples automatically mix, automatic gas-liquid separation, the whole process to ensure a good air tightness. 3. Online heating system:
① equipped with online heating system, the sample is being delivered at the same time heating, no additional thermostatic water bath;
② open the heat function, the sensitivity increased by about 50%. 4 software system
① software for any current operating system that can automatically control the various components of the control feedback;
② pre-stored in the analysis of the parameters of the software, the analysis can be called directly, without memory;
③ analysis of real-time production analysis of the spectrum, and the spectrum can be saved together with the data, adjustable at any time;
④ sample name can be freely modified, support for Chinese and English input;
⑤ do not allow the data to be input directly and enhance the fairness of the analysis results;
⑥ provide sample retest test function.
Introduction: Gas phase molecular absorption spectroscopy is a simple and rapid analytical method that emerged in the 1970s. It uses a ground state gas molecule to absorb a specific ultraviolet spectrum for quantitative measurement. In the field of water quality monitoring, the measurement of nitrite nitrogen, nitrate nitrogen, total nitrogen, sulfide, ammonia nitrogen and other substances in water is carried out by converting the components to be tested into gas molecules under specific analytical conditions. System, measuring its characteristic spectral absorption. This kind of analysis technology has gradually matured in China, and many reports and national standards have been released.
Gas phase molecular absorption spectrometers are widely used in drinking water production, environmental monitoring, petrochemical, sanitary and epidemic prevention, food industry, soil, chemical fertilizers, chemical reagents, paper, leather, printing and dyeing, industrial and mining enterprises, civil engineering, marine and fishery, and hydrological monitoring. Water quality analysis in various fields.
