The fully automatic UV oil analyzer is a precision analytical instrument developed based on UV absorbance characteristics, mainly used for rapid and accurate measurement of oil content in water bodies. This instrument integrates optical, mechanical, electrical, and computer technologies, and has the characteristics of high automation and intelligence. It is widely used in fields such as environmental monitoring, petrochemicals, and sewage treatment.

01 Technical principle: From UV absorption to precise measurement

The core working principle of the fully automatic UV oil analyzer is based on Lambert Beer law, which states that the absorbance of a substance to light is proportional to its concentration. The instrument determines the oil content by measuring the absorbance intensity through the interaction between specific wavelengths of ultraviolet light and oil molecules.

The specific workflow includes several key steps. In the extraction stage, under the condition of pH ≤ 2, the oil substances in the sample are extracted by n-hexane, and the oil in the water is fully extracted using stereo stirring technology. Subsequently, impurity removal treatment is carried out, and the extraction solution is dehydrated by anhydrous sodium sulfate, and then adsorbed by magnesium silicate to remove polar substances such as animal and plant oils. Finally, measurement and analysis are conducted. The absorbance of the purified solution is measured at a wavelength of 225nm, and the petroleum content is calculated based on the absorbance value.

The entire analysis process has achieved fully automated operation, covering automatic sampling, automatic extraction, automatic water and impurity removal, automatic measurement, automatic cleaning, automatic liquid discharge, and data storage, without the need for operators to directly contact chemical reagents.

02 Instrument Structure: Collaborative Work of Precision Components

The fully automatic ultraviolet oil analyzer consists of three major systems. The fully automatic operating software system is responsible for controlling the operation of the instrument. The built-in computer usually uses the Windows system and is equipped with a touch screen interface to achieve one click operation. The UV spectroscopic system is the core detection part of the instrument, using a UV light source and optical path system, with a wavelength range typically from 190nm to 1100nm. The magnetic stirring extraction system is responsible for sample pretreatment, using n-hexane as the extraction solvent and achieving efficient extraction through drum type three-dimensional stirring technology.

The oil-water separation technology of the instrument is its key innovation point. Using microporous polytetrafluoroethylene material filter membrane to isolate impurities and moisture, combined with porous membrane block and unique flow channel design, it can effectively treat emulsified water samples, high chromaticity and turbidity water samples. Some models of anti blocking and demulsification membranes have an effective filtration diameter of over 35mm, and one membrane can be used up to a hundred times.

The magnesium silicate automatic adsorption system achieves infinite automatic filling and replacement, ensuring that each water sample extract undergoes new magnesium silicate adsorption to avoid cross contamination. The instrument is also equipped with an automatic waste discharge and cleaning system, which can automatically clean the pipeline after measurement is completed, preparing for the next inspection.

03 Performance Features: Efficient and Accurate Technical Advantages

The automation level of the fully automatic ultraviolet oil analyzer is its significant advantage. The instrument can achieve one click completion of multiple water sample detections without the need for manual intervention, greatly reducing the workload of operators. The automatic detection time for a single sample usually only takes 2-8 minutes. In terms of detection performance, it has excellent sensitivity and method detection limit. The detection limit of the instrument can usually reach DL<0.02mg/L, and the method detection limit is 0.001mg/L. The repeatability index RSD (relative standard deviation) is ≤ 1% (measured 11 times for 2-20mg/L oil samples), and the accuracy is ＜ ± 2%, meeting the requirements of precision analysis.

The instrument also has good safety performance. The fully enclosed operation eliminates the need for personnel to come into contact with harmful reagents such as n-hexane, and the standard fume hood operation further ensures the health of personnel. At the same time, the instrument has a fault self checking function, which automatically detects pre-processing and host status when turned on, and emits sound and light alarms when faults occur. It also supports remote operation and data management, and can be monitored remotely through a mobile app. Data can be directly connected to the laboratory data platform through communication protocols. Good baseline stability, zero point automatic real-time adjustment, effectively eliminating the impact of baseline drift.

04 Application areas: Environmental monitoring tools for multiple industries

The fully automatic ultraviolet oil analyzer plays an important role in the field of environmental monitoring. This instrument can be used to monitor the content of oil substances in surface water, groundwater, and seawater, helping to detect and investigate water pollution problems in a timely manner. For monitoring water bodies such as rivers, lakes, and oceans, it can quickly and accurately determine the oil content in water, providing data support for environmental protection. In the petrochemical industry, fully automatic ultraviolet oil meters can be used to monitor the purity and quality of oil products during the production process. By measuring the total oil content and related parameters in the oil product, ensure product quality and safety. In addition, the instrument can also be used for blending and formula research of oil products, helping to optimize the production process. Emergency rescue is another important application scenario. In emergencies such as oil spills and fires, the content of oil substances in contaminated areas can be quickly measured, providing scientific basis for emergency response and disposal. Especially in emergency situations such as offshore oil spills, it can respond quickly and provide accurate oil pollution data.

In addition, the instrument is widely used in the field of pollution control. By monitoring the oil content in the wastewater discharged by enterprises, it helps to regulate their pollution behavior and promote the implementation of their environmental protection responsibilities. At the same time, it also plays an important role in various fields such as scientific research and teaching in universities, agricultural environmental monitoring, and automobile manufacturing.