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Infrared spectrophotometry water quality analysis oil analyzer
The GL-7100 infrared spectrophotometer for water quality analysis and oil measurement is an infrared spectrometer developed according to the environme
Product details
1 GL-7100Infrared spectrophotometry water quality analysis oil analyzer
2、 Execution standards
1. Meets national standard: HJ637-2018 Determination of water quality, petroleum and animal and vegetable oils Infrared photometric method
2. Compliant with national standard: GB3838-2002 Surface Water Environmental Quality Standard
3. Compliant with national standard: GB18483-2001 Emission Standard for Cooking Fumes in the Catering Industry
4. Compliant with national standard: GB18918-2002 Pollutant Discharge Standard for Urban Sewage Treatment Plants
IIIapplication area
1. Environmental protection departments monitor oil content in surface water, groundwater, domestic sewage, and industrial wastewater
2. Monitoring of oil content in circulating water and wastewater in industries such as petroleum and petrochemical, chemical smelting, etc
3. Monitoring of oil content in circulating water and wastewater in industries such as power plants, steel mills, and machinery manufacturing
4. Monitoring of Oil Content in Water Source of Water Supply Company
5. Monitoring of oil content in irrigation and production water for agriculture, forestry and animal husbandry
6. Monitoring of Oil Content in Water in Marine and Fishery Environments
7. Monitoring of Oil Content in Water by Water Conservancy, Hydrology, and Municipal Water Supply and Drainage Departments
8. Railway environmental and epidemic prevention departments monitor oil content in water
9. Monitoring of oil content in water by major research institutes and third-party testing
4、 Technical principles
When a monochromatic light passes through the measured solution, its energy will be absorbed. The intensity of light absorption is proportional to the concentration of the substance being measured, in accordance with Lambert Beer's law: A=log (1/T)=log (I0/I)=a × b × c. According to the HJ637-2018 national standard, oil substances in water are extracted using tetrachloroethylene or *, and then impurities and water are isolated using anhydrous sodium sulfate to separate the oil and tetrachloroethylene or * solution, and the total oil content of the extract is determined. At the same time, the extract can be adsorbed with magnesium silicate, and after removing polar substances such as animal and vegetable oils, petroleum can be determined. The total extract and petroleum content were calculated based on the absorbance A2930, A2960, and A3030 at spectral bands with wave numbers of 2930 cm-1 (stretching vibration of C-H bond in CH2 group), 2960 cm-1 (stretching vibration of C-H bond in CH3 group), and 3030 cm-1 (stretching vibration of C-H bond in aromatic ring), respectively. The content of animal and vegetable oils is calculated based on the difference between the total extract and petroleum content.
5、 Product Features
1GL-7100Infrared spectrophotometry water quality analysis oil analyzerAdopting high-throughput optical system, integrated optical path design, short optical path length, high energy, small instrument size, light weight, first splitting and then absorbing, meeting the requirements of infrared spectroscopy characteristics, good stability, and high signal-to-noise ratio.
2. The use of electrically modulated light sources not only reduces the heat generation intensity of the light source to facilitate system heat dissipation, but also simplifies the instrument structure and improves instrument stability due to the absence of mechanical cutting moving parts.
3. Using a special precision stepper motor to control the grating, it has wavelength correction function, high wavelength accuracy, and good repeatability.
4. The automatic reference wavelength correction function improves the automation performance of the instrument.
5. The sensor adopts a low-noise amplification circuit, which improves the instrument's signal-to-noise ratio and low detection limit.
6. The control unit adopts ARM architecture microprocessor to ensure powerful computing speed.
7. The colorimetric cell structure design is suitable for any colorimetric dish ranging from 0.5 to 5 centimeters.
8. The optical and electrical systems of the instrument are integrated and highly integrated, thereby improving the reliability and maintainability of the instrument.
9. Equipped with spectral scanning function, it displays the absorbance curve within the spectral range used to distinguish interfering substances.
10. Can verify whether the purity of the extractant meets the measurement requirements.
11. Easy to operate, just click the mouse to complete a single oil sample measurement.
12. The accompanying PC software has powerful functions, and measurement data and spectra can be saved to the hard drive for easy access and printing at any time. And it has functions such as automatic zeroing and regression equation calculation.
6、 Technical parameters
| Project | Explanation |
| baseline drift | No drift (using mechanical cutting to eliminate baseline drift) |
| Low detectable concentration | 0.002mg/L (oil concentration in water) |
| Detected concentration | 640000mg/L (oil concentration in water) |
| Wavenumber range | Correction coefficient accuracy: Take an appropriate amount of petroleum standard solution, prepare an appropriate concentration of petroleum standard solution using tetrachloroethylene as the solvent, and measure it using the same steps as the sample, with an error of ± 10%; 3400cm-1～2400cm-1（2940nm～4167nm） |
| accuracy | ±1cm-1 |
| Wave number repeatability | ±1cm-1 |
| Range of absorbance | 0.0000-3.0000 AU (i.e. transmittance of 100-1% T) |
| Basic measurement range | 0.00～800.00mg/L |
| repeatability | Relative standard deviation RSD<0.6% (for standard oil samples with concentrations ranging from 20 to 80mg/mL) |
| IDLs | 0.05mg/L (3 times standard deviation of 11 measurements of tetrachloroethylene blank solution) |
| Method Detection Limit | When the sample volume is 500ml and the extraction solution volume is 50ml, the detection limit is 0.06mg/L; |
| Linear correlation coefficient | R＞0.999 |
| Sample analysis time | Full spectrum scan takes about 30 seconds |
| Multiple fixed-point scans | About 10 seconds |
| Non dispersive infrared scanning | About 2 seconds |
| Zero adjustment of blank solvent | Automatic, no need to adjust the fullness |
| Net weight of the host | 10kg |
| Use power supply | (220 ± 22) VAC, (50 ± 1) Hz |
| Use temperature and humidity | Temperature range 5 ℃ -35 ℃, humidity ≤ 80% |
| external dimensions | 470mm (length) x 330mm (width) x 150mm (height) |
6、 Supporting equipment
1. Spectrophotometer mainframe
2. Dual jet extractor
3. Haier notebook computer
4. PC research operation software
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