Portable Infrared Spectrophotometer for Oil Analysis: Rapid On-Site Detection of Water and Soil Oil Pollution

Oil pollution is an important indicator of water and soil pollution, and accurate determination of oil content is of great significance for environmental protection and pollution control. Traditional laboratory analysis methods have problems such as complex operation, long time consumption, and inability to conduct rapid on-site testing. The emergence of portable infrared spectrophotometer provides a new technological solution for oil pollution monitoring.

Technical principles

1. Basic principles of infrared spectrophotometry

The portable infrared spectrophotometer is based on the principle of infrared spectrophotometry, and uses the characteristic absorption of CH, CH2, and CH3 groups in oil substances at specific wave numbers (3030cm ⁻¹, 2930cm ⁻¹, 2960cm ⁻¹) for quantitative analysis. These functional groups are inherent characteristic structures in various oil products worldwide, and by measuring their characteristic absorption in the infrared region, the oil content in the sample can be accurately determined.

2. Correction coefficient method

The instrument adopts the calibration coefficient method specified by the national standard, using 20mg/L n-hexadecane, 20mg/L isooctane, and 100mg/L benzene for calibration. By calculating the calibration coefficients of methylene CH2 group, methyl CH3 group, and Ar-H aromatic hydrocarbon, the measurement results are not affected by changes in petroleum origin, ensuring the accuracy and reliability of the detection.

Performance characteristics

1. High precision detection performance: The instrument detection limit is DL ≤ 0.04mg/L, the method detection limit is 0.06mg/L, and the detection concentration can reach 0.003mg/L. The measurement range covers 0-99% oil content, with a basic measurement range of 0.0-800mg/L. The repeatability RSD is ≤ 0.6%, the accuracy error is ≤ 2%, and the correlation coefficient r is>0.999, ensuring the accuracy and reliability of the detection results.

2. Intelligent operating system: Adopting the Android 7.1 intelligent operating system, equipped with an 8-inch color touch screen, the operating interface is intuitive and friendly. Built in wireless network function, supporting WiFi networking and data uploading, enabling real-time transmission and remote monitoring of detection data.

3. Powerful data processing capability: The instrument has a built-in 16GB storage space, which can store more than 1 million pieces of detection data and supports USB export. Equipped with automatic synchronization of network time function to ensure the accuracy of data timestamps. Support spectrum zooming in and out, making it easy for users to observe the curve characteristics at low concentrations in detail.

4. Portable design: The instrument size is 500mm × 350mm × 200mm, lightweight, and easy to carry on site. Adopting an electrically modulated light source and a detachable integrated optical system, the structure is compact, stable, and has a high signal-to-noise ratio. Real time automatic zeroing function simplifies the operation process and improves long-term signal stability.

Application Fields

Portable infrared spectrophotometer is widely used in the following fields:

Environmental monitoring: monitoring of oil pollution in surface water, groundwater, domestic sewage, and industrial wastewater

Soil testing: determination of mineral oil and animal and vegetable oil content in soil

Exhaust gas monitoring: emission detection of oil fume and oil mist

Petrochemical industry: monitoring of oil leakage during production process

Hydrological monitoring: monitoring of oil pollution in rivers, lakes, seawater bodies

Emergency monitoring: rapid on-site detection of sudden oil pollution accidents

Industry pain points and solutions

1. Low detection efficiency: Traditional laboratory analysis methods have complex processes and take a long time, which cannot meet the needs of rapid on-site detection.

Solution: The instrument can complete full spectrum scanning within 3 minutes, achieving rapid on-site detection and greatly improving detection efficiency.

2. Complex operation: Traditional detection equipment is complex to operate and requires professional personnel to operate.

Solution: Intelligent operating system and touch screen interface make operation more simple and intuitive, and non professionals can quickly get started.

3. Inconvenient data management: Manually recording data is prone to errors and difficult to conduct long-term trend analysis.

Solution: The instrument has large capacity data storage and wireless transmission functions, supports real-time data upload to the cloud platform, and facilitates data management and analysis.

4. Poor portability of devices: Traditional devices are bulky, heavy, and inconvenient to carry.

Solution: Portable design and integrated optical system make the instrument small in size, light in weight, and convenient for on-site flow detection.

The portable infrared spectrophotometer has become an important tool in the field of environmental monitoring due to its fast, accurate, and portable characteristics. This instrument not only solves multiple pain points in traditional detection methods, but also provides a more efficient solution for oil pollution monitoring. With the continuous improvement of environmental protection requirements, portable infrared spectrophotometers will play an increasingly important role in environmental monitoring, pollution control, and emergency management.

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