Infrared Spectrophotometric Oil Analyzer

I. Product Overview

The infrared spectrophotometric oil analyser is developed and manufactured according to the Chinese environmental protection standards 《HJ 637-2018 Water quality — Determination of petroleum oils and animal and vegetable oils — Infrared spectrophotometric method》, 《HJ 1051-2019 Soil — Determination of petroleum hydrocarbons — Infrared spectrophotometric method》 and 《HJ 1077-2019 Stationary source emissions — Determination of oil fume and oil mist — Infrared spectrophotometric method》. It is a dedicated infrared spectroscopic analyser for determining the oil content of surface water, groundwater, industrial wastewater, soil, stationary source emissions, oil fume and oil mist.

II. Applications

Widely used in water environment testing systems, wastewater treatment plants, water supply companies, petrochemicals, universities and research institutes, hydrology and water conservancy, metallurgy and steel, biomedicine, agricultural environmental monitoring, wool textile printing and dyeing, marine environmental monitoring, paper making, pharmaceuticals, agricultural science and technology and marine transport.

III. Measuring Principle

According to HJ 637-2018 the oil substances in water are extracted with tetrachloroethylene and the total extract is measured. The extract is then adsorbed with magnesium silicate to remove animal and vegetable oils and other substances before the petroleum fraction is measured. The contents of the total extract and of the petroleum fraction are both calculated from the absorbances A2930, A2960 and A3030 at wavenumbers 2930 cm⁻¹ (C-H stretching vibration of CH₂ groups), 2960 cm⁻¹ (C-H stretching vibration of CH₃ groups) and 3030 cm⁻¹ (C-H stretching vibration of aromatic hydrocarbons). The animal and vegetable oil content is calculated as the difference between the total extract and the petroleum fraction.

IV. Key Features

1. Complies with HJ 637-2018: the three-wavenumber infrared spectrum is clear with accurate scaling, and the absorption spectra and absorbances at the three wavenumbers are clearly displayed.

2. Android 7.1 smart operating system with the manufacturer's dedicated oil analysis software, integrating spectrum display, scanning, analysis and calculation.

3. Built-in 8-inch HD colour touch screen; touch operation or an external wireless mouse and keyboard for convenience.

4. Both correction-coefficient calibration and standard-curve calibration are available, meeting the requirements of different environments; users can also build their own standard curves.

5. Light source life of more than 10,000 hours; electrically modulated light source technology prevents internal overheating from affecting stability.

6. Detachable integrated optical system giving a compact instrument, short optical path and high energy; the optical path meets the characteristics required for infrared spectroscopy with good stability and a high signal-to-noise ratio.

7. In addition to basic functions such as detection settings, curve analysis and historical data, the spectrum can be zoomed in and out indefinitely so that low-concentration curves can be observed more clearly.

8. Automatic network time synchronisation avoids inaccurate local time, and therefore inaccurate report timestamps, after long use.

9. Self-developed weak-signal conditioning circuit effectively suppresses noise interference and greatly improves accuracy and the detection limit.

10. Highly automated programs allow single-step testing of all instrument functions through the Android system, automatic wavelength scanning and automatic correction for more accurate data.

11. Extractant purity testing avoids erroneous results caused by sub-standard extractant purity.

12. Wi-Fi and Bluetooth transmission for wireless upload to the cloud data management platform; USB drive data copying with driver-free plug-and-play.

13. Electronic cloud data management platform for permanent storage of results and short- and long-term review and analysis.

14. One-key program upgrade: the APP can be upgraded by inserting a USB drive, without an engineer on site.

15. Electrically modulated light source reduces heat generation for better heat dissipation and, by eliminating mechanical chopper components, simplifies the structure and improves reliability.

16. Real-time automatic zero adjustment: the instrument acquires both the signal with the light source on and off, achieving real-time zero-point adjustment, simplifying operation and improving long-term signal stability.

17. High measurement accuracy: a 24-bit AD conversion chip accurately measures signals down to the μV level.

V. Technical Parameters