UV oil analyzerIt is an analytical instrument designed based on the principle of interaction between ultraviolet light and oil molecules, mainly used for rapid and accurate determination of petroleum, animal and vegetable oils, and total oil content in water bodies (such as surface water, groundwater, seawater, domestic water, etc.).

　　UV oil analyzerOperation steps (taking standard process as an example)

Pre startup inspection and preparation

Instrument inspection: Confirm that the appearance of the instrument is intact, the power and data cables are firmly connected, and there is no looseness or detachment.

Reagent preparation: Use n-hexane as the extractant (in compliance with environmental requirements), prepare anhydrous sodium sulfate (dehydration), magnesium silicate (adsorption of animal and vegetable oils) and other reagents.

Sample collection: Collect the water sample to be tested, ensuring that the sample is representative and uncontaminated. If petroleum products need to be measured, the sample needs to be acidified under pH ≤ 2 conditions to stabilize the oil substances.

Power-on and warm-up

Open the instrument host and supporting software (such as UV980 water oil workstation), preheat for 30 minutes to a stable working temperature.

During the preheating period, parameter settings can be made, such as selecting "UV spectrophotometry", setting the absorption range (usually 0A-1A), signal communication port, etc.

Standard curve production

Preparation of standard samples: Dilute standard oil to prepare concentration gradient standard samples (such as 0, 1, 2, 4, 8, 16mg/L).

Enter concentration value: Enter the concentration of the standard sample from low to high into the "concentration value" column of the software.

Blank zeroing: Add blank n-hexane to a colorimetric dish for blank zeroing, and save the file (named after the date).

Standard sample determination: Measure each concentration standard sample sequentially, click "Calculate" to generate a curve, and check the linear correlation coefficient (R ≥ 0.999 is qualified).

Save Curve: Name the curve and save it for future sample measurements.

Sample determination

Sample processing:

Petroleum: After acidifying the water sample, extract it with n-hexane. The extract is dehydrated with anhydrous sodium sulfate and adsorbed with magnesium silicate to remove animal and vegetable oils.

Animal and vegetable oils: The extract is not adsorbed by magnesium silicate and can be directly measured.

Total oil: The extract is directly measured without any treatment.

Execute detection: Select the corresponding execution file based on the type of oil being tested (such as "Automatic measurement of petroleum in blank water samples"), place the sample or blank water sample, enter the name, and click save.

Result recording and analysis

Record measurement results (such as concentration values, measurement time), export data to external storage devices or print reports.

Combine other parameters (such as sample volume, dilution ratio) to comprehensively analyze the quality or contamination of oil products.

Shutdown and Cleaning

Return to the main menu, turn off the instrument power, clean the instrument surface and sample slot, and avoid residue affecting the next test.