Oil Content Analyzer infrared spectrophotometer Model: CN61M/OIL-460 Item: m110750
Principle introduced
Qualitative analysis:
After a certain frequency of infrared elements, if a key molecule in a vibrational frequency and it is the same, the key to increased absorption of infrared energy, the vibration will be strengthened; the same frequency if the molecule is not the key, it will not be absorbed infrared . If the continuous change in the frequency of infrared light samples, the infrared absorption cell through the sample, some regions strong in some areas is weak, resulting in infrared spectra.
Quantitative analysis:
When a monochromatic light through the test solution, its energy will be absorbed. Light is absorbed and the strength is proportional to the measured concentration of a substance.
That is consistent with Beer's law:
A = log (1 / T) = log (I0 / I) = a * b * c
Standard
Chinese National Standard "GB/T16488-1996 water oil and animal and vegetable oils Determination of infrared spectrophotometry."
Applications
The instrument is very wide applications, including the following areas:
◇ environmental monitoring stations: surface water, groundwater, sewage, industrial waste oils in the determination of
◇ environmental monitoring: determination of cooking fume emission performance standards: GB18483-2001 standard of cooking fume emissions from January 1, 2002 implementation of water purification stations ◇ central municipal drainage and sewage treatment plant performance standards: GB18918-2002, <urban sewage treatment plant pollutant emission standards>, July 1, 2003 implementation
◇ urban water supply company or water company executive standard: GB3838-2002 <Surface Water Quality Standards> June 1, 2002 implementation
◇ drainage outside the petroleum and petrochemical industry performance standards: oil refining industry, water pollutant discharge standard GB3551-83 and <Integrated Wastewater Discharge Standard> GB8978-1996
◇ railway environment monitoring station <railway truck wash wastewater discharge standards> GB 5469-85
◇ Power Plant Environmental Monitoring Station
◇ steel industry environmental monitoring <steel industrial water pollutant discharge standards> GB 13456 - 92 1992 ，May，18th from country Environmental Protection Agency approved July 1, 1992 implementation)
◇ agriculture, environmental monitoring <irrigation water quality standards> GB5084-92
◇ hydrological Executive Standard: GB3838-2002 <Surface Water Quality Standards> June 1, 2002 implementation
◇ research and teaching
◇ Marine Environmental Monitoring
◇ Traffic Environmental Monitoring
Instrument Features
◇ Removable integrated optical system, the instrument small size, optical path is short, energy, the first absorption spectrophotometry, in line with requirements of the infrared spectral characteristics, good stability, high signal to noise ratio;
◇ Electric modulated light source, not only reduces the light intensity in order to facilitate heating system thermal, and optical motion due to reduced mechanical cutting device to simplify the apparatus structure, improve equipment reliability;
◇ non-expert maintenance, instrument optics, self-contained electrical system, high degree of integration, thereby increasing equipment reliability and maintainability;
◇ Real-time auto-zero, the computer only when the signal light source acquisition, and acquisition of the signal light goes out, to achieve real-time auto-zero is to simplify operations and improve the signal long-term stability;
◇ High-efficiency analysis, the instrument can be completed in 40 seconds a determination of the oil sample analysis, the whole spectrum of single-point acquisition 40--72 seconds optional, will be collected several times the wavelength 40 seconds, five seconds of non-dispersive infrared method Bell;
◇ imminent, when the instrument calibration, just gently press the space bar, the instrument will be pre-selected according to the method, standard curve analysis of the number of completed samples of the three wave number 3030cm-1, 2960cm-1, 2930cm-1 Auto scan analysis, and results appear on the screen and recorded a pre-specified file, after analyzing a sample of the next prompt analysis of samples after replacing just gently press the space bar;
Performance indicators
◇ baseline drift is not greater than 0.010AU/30min;
◇ detection limit is less than 0.2mg / L (solvent extraction);
◇ relative standard deviation RSD <5% (concentration of 30 ~ 40mg / L standard oil samples);
◇ linear correlation coefficient r> 0.999.
Specifications
Wave number range: 3400cm-1 ~ 2440cm-1 (ie 2940nm ~ 4100nm);
Absorbance range: 0.0000 ~ 1.0000AU (ie transmission rate 100 ~ 10% T);
Basic measuring range: 0.2 ~ 80mg / L (4cm quartz cuvette cell);
Minimum detectable concentration: 0.002mg / L (4cm quartz cuvette cell, 100 times concentrated extract);
Maximum measured concentration: 64000mg / L (0.5cm quartz cuvette cell, diluted 100-fold);
Sample analysis time: the whole spectrum of single-point scanning 30 - 60 seconds optional;
Point repeatedly scan: 15 seconds;
Non-dispersive infrared method: 2 seconds.
Blank zero solvent extraction: automatic;
Host Dimensions: 400mm (length) × 260mm (width) × 150mm (H);
Weight: 12kg;
Host Power: (220 ± 22) V, (50 ± 1) Hz, 50VA.
The basic functional unit composed of the instrument
Optical electrical system computer control system host data processing system
* Source; * modulated light circuit; * A / D conversion;
* Mirror; * wavelength stepper motor control circuit; * switch control;
* Cuvette cell wavelength positioning circuit; * instrumental parameter settings;
* Raster; * preamplifier; • The instrument correction factor determination;
* Detector. * Module (A / D) converter circuit. * Unknown sample analysis;
* Results of the analysis process.
Normal environmental conditions, equipment
Ambient temperature: 5 ~ 35 ℃ (working time temperature is not greater than 5 ℃ / 8h);
Relative Humidity: 80%; equipment should be placed in the absence of severe vibration, corrosive gases, no strong electromagnetic interference, a well-ventilated, dust-free laboratory;
Power Supply: (220 ± 22) VAC, (50 ± 1) Hz; other large spectrum of requirements and conditions of use the same instrument.
Instruments of transportation and storage requirements
◇ product in the original packaging conditions, the indoor temperature requirements of 5-35 ℃, relative humidity not exceeding 90%, non-corrosive materials can contain substances;
◇ products in the transportation, storage, avoid strong vibration and impact;
◇ product to avoid near the strong electric and magnetic fields;
◇ products during transport to rain, water.
Size 400 * 260 * 150mm
Weight: 15kg
Voltage power: 220V, 50HZ, 50W
Configuration: (without computer)
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