DRK-GL-7100 Infrared Spectrophotometric Oil Analyzer

Product Introduction

DRK-GL-7100 infrared spectrophotometric oil analyzer is a dedicated infrared spectrometer developed in accordance with the “Determination of Petroleum and Animal and Vegetable Oils – Infrared Spectrophotometric Method” (HJ637 – 2018), an environmental protection standard of the People’s Republic of China. It is used to determine the contents of total oil, petroleum, and animal and vegetable oils in water.

Application Fields

It can be widely used in the following fields: oil content monitoring in surface water, groundwater, domestic sewage, and industrial wastewater by environmental protection departments; oil content monitoring in circulating water and sewage in industries such as petrochemical, chemical smelting, etc.; oil content monitoring in circulating water and sewage in industries like power plants, steel mills, and machinery manufacturing; oil content monitoring in water sources by water supply companies; oil content monitoring in irrigation and production water in agriculture, forestry, and animal husbandry; oil content monitoring in water in marine and fishery environments; oil content monitoring in water by water resources, hydrology, and municipal water supply and drainage departments; oil content monitoring in water by railway environmental and epidemic prevention departments; and oil content monitoring in water by major scientific research institutions and third – party testing agencies.

Standards Complied With

• Complies with the national standard: HJ637 – 2018 Determination of Petroleum and Animal and Vegetable Oils in Water – Infrared Photometric Method
• Complies with the national standard: GB3838 – 2002 Environmental Quality Standards for Surface Water
• Complies with the national standard: GB18483 – 2001 Emission Standard for Oil Fume in the Catering Industry
• Complies with the national standard: GB18918 – 2002 Pollutant Discharge Standard for Municipal Wastewater Treatment Plants

Technical Principle

When a monochromatic light passes through a test solution, its energy will be absorbed. The intensity of light absorption is proportional to the concentration of the substance being measured, which conforms to the Lambert – Beer law: A = log(1/T)=log(I₀/I)=a×b×c. According to the HJ637 – 2018 national standard, tetrachloroethylene or carbon tetrachloride is used to extract oil – based substances in water. Then, anhydrous sodium sulfate is used to separate impurities and water, and the solution of oil and tetrachloroethylene or carbon tetrachloride is separated for the determination of the oil content in the total extract. At the same time, the extract can be adsorbed by magnesium silicate. After removing polar substances such as animal and vegetable oils, the petroleum content can be determined. The contents of the total extract and petroleum are calculated based on the absorbances A2930, A2960, and A3030 at the wavenumbers of 2930cm⁻¹ (the stretching vibration of the C – H bond in the CH₂ group), 2960cm⁻¹ (the stretching vibration of the C – H bond in the CH₃ group), and 3030cm⁻¹ (the stretching vibration of the C – H bond in the aromatic ring). The content of animal and vegetable oils is calculated as the difference between the content of the total extract and the content of petroleum.

Product Features

• It adopts a high – throughput optical system and an integrated optical path design, with a short optical path and high energy. The instrument is small in size and light in weight. It first disperses light and then absorbs it, which meets the requirements of infrared spectroscopy characteristics, has good stability, and a high signal – to – noise ratio.
• It uses an electrically modulated light source, which not only reduces the heat intensity of the light source for better system heat dissipation but also simplifies the instrument structure and improves its stability since there are no mechanical light – chopping moving parts.
• It uses a special precision stepping motor to control the grating, with a wavelength correction function, high wavelength accuracy, and good repeatability.
• It has an automatic reference wavelength correction function, which improves the automation performance of the instrument.
• The sensor uses a low – noise amplification circuit, which improves the signal – to – noise ratio and the minimum detection limit of the instrument.
• The control unit uses the latest ARM – architecture microprocessor to ensure a strong computing speed.
• It has a unique cuvette structure design that is suitable for any cuvette with a path length of 0.5 to 5 cm.
• The optical and electrical systems of the instrument are integrated, with a high degree of integration, which improves the reliability and maintainability of the instrument.
• It has a spectrum scanning function that can display the absorbance curve within the used spectral range, enabling the identification of interfering substances.
• It can check whether the purity of the extractant meets the measurement requirements.
• It is easy to operate. Only a few mouse clicks are required to complete the determination of an oil sample.
• It uses dual – wireless connection. The tablet computer is wirelessly connected to the main unit of the oil analyzer, and the keyboard and mouse are wirelessly connected to the tablet computer.
• The supporting PC software is powerful. Measurement data and spectra can be saved to the hard disk, and can be retrieved and printed at any time. It also has functions such as automatic zero – adjustment and regression equation calculation.

Technical Parameters

Delivery List