According to the national standard, the principle of infrared spectrophotometry is used to detect petroleum and animal and vegetable oils in domestic sewage and industrial wastewater, as well as the lampblack emission from catering industry. After on-site installation and debugging, water samples can be detected by preheating for 5 minutes.
Tetrachloroethylene extraction technology is adopted. Before measurement, the hydrocarbons (oil) in the water sample to be measured are extracted and allowed to surface. This unique design and the use of disposable tools eliminate the influence of cross-contamination between samples and make the measurement process safe and reliable.
The extraction process is very simple: firstly, the water sample and tetrachloroethylene are added into the sample bottle according to a certain proportion, and the sample bottle is shaken for two minutes, and then the extracted oil sample floats on the water surface. Suck the extracted oil sample from the sample bottle with a disposable straw and inject it into a small sample tube for measurement.
Functions/features of Binci LS3600 water-oil analyzer;
● Qualcomm imported optical platform system, with precise refractive optical path design, short optical path, large energy, small instrument volume, light weight, splitting light before absorption, meeting the requirements of infrared spectrum characteristics, good stability and high signal-to-noise ratio.
● Imported infrared light source is adopted to reduce the heating intensity of the light source, which is beneficial to system heat dissipation. The service life of the light source can reach more than 1000 hours, which improves the stability of the instrument.
● Precise stepping motor is used to subdivide the control grating, which has high wavelength accuracy and good repeatability.
The unique structural design of the colorimetric cell is suitable for any cuvette with a thickness of 0.5 to 5 cm.
● It has the function of continuous spectrum scanning, displaying the spectrum of the sample, so as to accurately distinguish the interferents and check whether the purity of the extractant meets the measurement requirements.
● The instrument can manually locate the wavelength position and accurately measure the absorbance at 2930cm- 1, 2960cm- 1 and 3030cm- 1 wavenumber.
● The analysis software is powerful and can automatically calculate, and the measurement results are automatically saved as test reports, including sample results, sample spectrograms, setting conditions, customer information, etc. More than 654.38 million pieces of information and data can be queried, printed and saved.
● Various environmental protection reagents can be used, such as trichlorotrifluoro, 997, S3 16, tetrachloroethylene, etc.
main feature
Test items: Determination of petroleum and animal and vegetable oils in industrial wastewater and domestic sewage, petroleum in soil and sludge, lampblack and oil mist in waste gas from stationary pollution sources.
Intelligent calibration: it has the functions of starting intelligent calibration, standard curve calibration and correction coefficient calibration.
On-line operation: it can be connected to a Windows computer for operation, which is convenient for spectral scanning and data processing.
Storage function: the upper computer can store the sample number, detection time, detection result, extractant type, etc.
Light source performance: refined grating system, service life of more than 6000 hours.
Scope of application:
It can be used to detect the discharge of petroleum and animal and vegetable oils in domestic sewage and industrial wastewater, as well as the lampblack in catering industry.
Applicable to: environmental monitoring stations, hydrological stations, petrochemical, machinery, automobile and aircraft manufacturing enterprises and institutions. Medicine, agricultural science and technology, marine transportation and other industries.
Oil content analyzer in water
Meet the national standard GB3838-2002 Surface Water Environmental Quality Standard.
Meet the national standard: GB 18483-200 1 oil fume emission standard.
It conforms to the national standard "HJ1051-2019 Determination Method of Soil Petroleum".
1. 1 conforms to the national environmental standard: HJ637-20 18 water quality-Determination of petroleum and animal and vegetable oils by infrared spectrophotometry.
1.2 conforms to the national standard GB3838-2002 Environmental Quality Standard for Surface Water.
1.3 conforms to the national standard: GB 189 18-2002 pollutant discharge standard for urban sewage treatment plants.
1.4 conforms to the national standard: GB 18483-200 1 lampblack emission standard.
1.5 conforms to the national metrological verification regulation: JJG 950—20 12 water-oil concentration analyzer.
1.6 conforms to the national standard: HJ 1077-20 19 infrared spectrophotometric determination of exhaust gas and oil mist from stationary pollution sources.
1.7 conforms to the national standard: HJ1051-2019 Determination of Soil Petroleum by Infrared Spectrophotometry.
1.8 conforms to the national standard: GB/T 12 152-2007 Determination of oil content in boiler water and cooling water.
Second, the test method of oil content in gas
1. The oil content in gas is an important index to evaluate the quality of gas products. The detection of oil content in gas has become an important link in the production and use of gas products.
2. The oil in the gas mainly comes from the pollution of the medium in the compressor or container when the gas is compressed, and the pollution of the compounds in the raw air. Its existing state can be divided into aerosol form with liquid particles and gas form, and the oil content concentration in the body is small.
The concentration of oil in gas is generally tens of milligrams per cubic meter. Therefore, in the whole determination process, from the preparation and dilution of standard oil to the preparation of samples and the selection of reagent blank, it is necessary to use the same bottle of reagent, or to calibrate according to the pre-mixed required standard amount of reagent and oil.
Equipment used: infrared spectrum analysis software has the analysis method in gas, and the oil content is calculated by absorption in light absorption. This method is used by many national standards to detect oil content, which can comprehensively detect oil content.
Recommended product (insert the picture model and contact number of the instrument) This product is a very mature infrared spectrophotometer analyzer developed for gas oil analysis, which provides a professional system scheme for oil content analysis.
Features: 1, in line with national standards, is a special gas detection instrument specially developed for gas oil content detection.
2. Comprehensively analyze the oil content in the gas without complicated calculation.
The result value can be read directly in 3.30 seconds, which is simple and easy to use, and the whole test method can be completed without professionals.
4. The instrument test results are directly read out, and the software is automatically imported into the formula for calculation, so there is no need to manually calculate the results.
5. Special gas oil content analyzer with data storage and automatic import file format.
6. It conforms to the determination of mineral oil in the air separation process, supports various national standard oil content testing methods, and is portable. Model a and fully automatic, all kinds of desktop machines are available.
7. Specializing in the quality inspection of various industrial gases, special gases, electronic gases and medical gases.
3. Sampling process
Fiber materials (absorbent cotton, glass fiber, polypropylene fiber, etc.) that fill a certain space. ), quantitative filter paper, glass fiber membrane or other adsorption materials (such as activated carbon, etc. In the sampling tube, let the sample gas pass through the sampling tube at a certain flow rate, record the oil in the gas sample with a wet gas meteor meter, and then dissolve it with organic solvent for determination. The absorbed sample solution is measured under the same conditions as the standard curve, and the oil concentration in the solution is obtained on the standard curve according to the measured absorbance, and then converted into the oil content in the unit gas.
4. Preventive measures
Only absorbent cotton can't absorb trace oil with particle size below 0. 1 Um, so two layers of quantitative filter paper can be added at both ends of the absorption tube to form an absorption system together with absorbent cotton. In fact, the adsorption and filtration effect of this method is much better than that of absorbent cotton alone.
Because there are many kinds of oil, the composition of different kinds of oil is very different, and because there are many kinds of oil in application, the composition of different kinds of oil is very different, and their absorption bands will be different when spectrophotometry is used. Therefore, the selection of standard oil is the key to the accuracy of oil content determination, and the standard solution should be prepared with the same or similar oil as the pollution source. When the source and composition of oil in gas cannot be determined, only suitable substitute products can be selected. Standard oil can be prepared manually with the ratio of n-hexadecane, isooctane and benzene of 65: 25: 20 (volume ratio).
6. Several problems that should be paid attention to in the determination of gas oil content.
Control of flow rate and sampling time in oil absorption process The gas flow rate in oil absorption process is an important factor affecting the absorption efficiency. When solvent absorption is used, excessive flow will make the absorption solvent volatilize, which will not only affect the absorption of oil, but also pollute the surrounding environment. When using adsorption materials for absorption, if the flow rate is too large, the absorption efficiency will be greatly reduced, and even the adsorption materials such as membrane or filter paper will be damaged, which will lead to the failure of the experiment, while if the flow rate is too small, the absorption time may be greatly prolonged. Therefore, according to different samples, experimental equipment and conditions, through continuous experiments, we need to gradually explore the best injection process to achieve a good balance between absorption efficiency and absorption time.
7. Recommended equipment Binmagnetic LS3600 precision oil content measuring instrument.
The R&D department of the company has made a convenient and fast sampling equipment through the laboratory, and completed the sample detection and analysis results quickly and accurately in the process of gas detection. The company provides a complete set of oil content detection solutions: the method is simple and practical, with high measurement accuracy, fast and convenient.