Working Principle

OIL520 Automatic Oil Content Analyzer injects quantitative n-hexane into the water sample, and extracts oil in the water by rotating stirring. The liquid is dehydrated and adsorbed by magnesium silicate to remove polar substances such as animal and vegetable oils, and then the absorbance is measured at a wavelength of 225nm. The content of petroleum and the absorbance value conform to the Lambert-Beer law. It is widely used in the determination of petroleum in surface water, groundwater and seawater.

System Composition

Preprocessing Unit
Infinite injection rotary device, which can store 10 samples to be tested at the same time, supports adding water samples in the middle, the device automatically reads the volume of water samples, automatically adds quantitative extraction solvent, and adopts rotary stirring extraction technology to complete water sample extraction and extraction liquid separation , the equipment automatically absorbs magnesium silicate in the extract, and the adsorbed extract is sent to the detection unit for detection and analysis. After the analysis, the equipment automatically completes waste liquid discharge and pipeline cleaning.

Detection Unit
This unit automatically detects the samples from the preprocessing unit and transmits the detection data to the working platform

Data Analysis Unit
The unit is composed of a computer and special software, which is used to process the data from the detection unit, analyze and obtain the test results according to the given experimental conditions, and output the test results in the form of screen display and report printout.

Features
1) High degree of automation: automatically complete extraction agent injection, sample extraction, extraction liquid separation, extraction liquid dehydration and adsorption, extraction liquid detection and system cleaning, saving manpower and time;

2) Infinite cycle injection: a rotating sample tray that stores 10 samples to be tested at the same time, supports adding water samples in the middle

3) Simultaneous processing of multiple samples: three independent working shafts can realize the stirring and extraction of the next sample while testing one sample, which will greatly reduce the detection time of a single sample;

4) High extraction efficiency: using rotary stirring perturbation extraction technology, the extraction efficiency is greater than 98%;

5) Automatically measure the volume of water samples: the automatic detection device of water sample volume can quickly and accurately measure the volume of water samples, and the software can directly read it without manual measurement and input;

6) Automatic replacement of magnesium silicate: no manual filling is required. The magnesium silicate reservoir automatically discharges the standard amount of magnesium silicate through the quantitative device each time it is used, and the magnesium silicate particles are fully shaken and mixed with the extraction liquid by air flow. Automatic discharge of used magnesium silicate after each use and automatic cleaning, reducing the risk of cross-contamination;

7) Magnesium silicate quantitative device: In order to prevent magnesium silicate from affecting the discharge due to agglomeration, a magnesium silicate quantitative device is specially designed, which can ensure that the magnesium silicate used each time can reach the standard dosage;

8) Automatic cleaning and waste discharge: after the test, the equipment automatically discharges waste liquid and cleans the pipeline by means of air blowing and self-cleaning, and there is no residue in the pipeline. At the same time, the used stirring rod is automatically cleaned, which does not affect the test of the next sample;

9) Automatic separation of waste liquid: After the extraction liquid is extracted into the separation tube for separation, the liquid to be tested is sent to the detection unit, and the remaining waste liquid is completely separated from the extraction agent and water by the separation device and then discharged to the special waste liquid bucket respectively. Avoid staff contact with toxic and harmful gases and liquids;

10) Exhaust gas collection system: independent waste discharge channel, the equipment can completely discharge harmful gas to the outside without placing it in a fume hood, avoiding the harm of toxic gas to experimenters

11) The equipment is easy to maintain: the patented separation and dehydration technology is used to remove trace moisture in the extract, without frequent replacement of anhydrous sodium sulfate, the maintenance cost is low, the use is more convenient, and the maintainability is better.

12) Perfect safety measures: In order to ensure the safety of the experimenter operating the instrument, a sensor is installed on the switch door of the unit. When the door is not closed, the sample stage will not rotate to prevent accidents and remind on the software. experimenter;

13) Moisture-proof device: a special desiccant is used to automatically remove the water vapor in the air to prevent the test results from being affected by factors such as magnesium silicate agglomeration and excessive humidity in the pipeline;

14) The whole system adopts anti-corrosion: choose anti-corrosion and oleophobic materials to ensure that the system is not corroded, no residue, no cross-contamination;

15) High-performance light source system: Deuterium light source is used, with high wavelength accuracy and a service life of more than 5000 hours;

16) Equipped with special analysis software: it integrates scanning and calculation analysis, and has a computer software copyright certificate;

17) Automatically configure the standard curve: the instrument automatically dilutes the standard solution and detects it according to the needs, and automatically generates the standard curve;

18) Automatic dilution: For over-range samples, the instrument can automatically dilute to ensure the accuracy of the test results

19) Reagent remaining amount monitoring: real-time monitoring of reagent remaining amount, if the reagent amount is insufficient, the software will automatically remind;

20) Equipped with a special sampler: a special sampler, a sampling bottle and a sampling box are randomly equipped. The material of the sampling bottle meets the standard requirements and can be directly tested on the machine without transferring the water sample to avoid the sample error caused by the transfer of the water sample;

21) Dedicated mobile phone APP: Through big data cloud processing, the functions of mobile phone for instrument operation status, fault warning, data approval query and remote diagnosis are realized;

Wavelength scanning range: 190-1100nm

Test wavelength: 225nm

Wavelength accuracy: ±0.5nm

Resolution: 0.001mg/L

Measuring range: 0-50mg/L

Extraction ratio: any ratio

The detection limit of the method: when the sample volume is 500mL, the extract volume is 25mL, and a 2cm quartz cuvette is used, the detection limit is 0.01mg/L;

Instrument detection limit: DL<0.04mg/L (3 times SD of 11 times of n-hexane blank solution);

Minimum detectable concentration: 0.002mg/L

Accuracy error: ≤±2%

Repeatability: RSD≤2%

Linear correlation coefficient: r > 0.999

Analysis time: The shortest time for single sample measurement is 7min (including pretreatment time), and it can be connected to infinite sample injection to measure samples

Sampling volume: 0~700ml sample cup (water sample cup has scale)

Dimension: 520mm(length)×390mm(width)×240mm(height)

Weight: 12Kg

Extraction unit size: 680mm (length) × 560mm (width) × 650mm (height)

Extraction unit weight: 25Kg

Power supply: (220±22)V, (50±1)Hz, 50VA

Temperature: -5-45℃

Relative humidity: 20%-95%