Instrument features:

1．useExtract the sample with n-hexane,Replace infrared method with carbon tetrachloride and extractant to meet the new national standards for petroleum.

2．stayUnder the condition of pH ≤ 2, the oil substances in the sample are extracted by n-hexane. The extract is dehydrated by anhydrous sodium sulfate, and then adsorbed by magnesium silicate to remove polar substances such as animal and plant oils. The absorbance is measured at a wavelength of 225 nm, and the petroleum content and absorbance value follow the Lambert Beer law.

3．Superior self diagnostic function, easy to observe instrument status.

4．The use of a 24 bit high-precision and high-speed conversion system can quickly obtain high-precision data.

5．The unique light source pre positioning system makes the replacement of the light source exceptionally simple,It can be replaced in 2 minutes.

6．The expandable intelligent attachment interface provides the possibility for customizing attachments. Provided a platform for secondary development for researchers.

7．A powerful software system that can achieve multiple functions such as wavelength scanning, dynamic testing, multi wavelength scanning, wavelength quantification, and scan quantification, while also possessing powerful data processing capabilities.

8．The software system has compliance withThe various functions of GLP standards.

9．Provide an automatic oil analysis software system that automatically calculatesPetroleum content.

application area

1.Determination of oil

Petroleum category:Refers to inUnder the condition of pH ≤ 2, the substance can be extracted by n-hexane without being adsorbed by magnesium silicate, and has characteristic absorption at 225nm;

Animal oil:The main component is glycerides containing saturated fatty acids;

vegetable oil:The main component is glycerides containing unsaturated fatty acids;

Animal and vegetable oils:Refers to inPart of the oil that can be extracted by n-hexane and adsorbed by magnesium silicate under pH ≤ 2 conditions;

Total oil:The total amount of petroleum and animal and vegetable oils.

Testing principle

according toHJ970-2018 standard, under the condition of pH ≤ 2, the oil substances in the sample are extracted by n-hexane. The extraction solution is dehydrated by anhydrous sodium sulfate, and then adsorbed by magnesium silicate to remove polar substances such as animal and vegetable oils. The absorbance is measured at a wavelength of 225 nm, and the petroleum content and absorbance value comply with Lambert Beer's law.

Instrument parameters:

Measurement items: Surface water, groundwater, and petroleum in the ocean, when the sampling volume is500 ml, extraction volume of 25 ml, using a 2 cm quartz colorimetric dish, the detection limit of the method is 0.01 mg/L, and the lower limit of determination is 0.04 mg/L.

Extraction reagent: n-hexane,Environmental protection and safety;

Automatic switching between Chinese and English in the software

Wavelength range:190nm～1100nm

5.1-inch color LCD screen, no need for computer direct operation.

Can be automatically tested at once6 samples

Calibration methods: single point rapid calibration, standard curve calibration, standard substance calibration

Calculation method: Set the water sample volume and n-hexane volume arbitrarily to directly display the water sample concentration

Measurement range:0-800mg/L

detection limit≤0.02mg/L(measure11Secondary blank calculation3Multiple standard deviation)

Linear:>0.999

Water sample dosage:10-600ml

Measurement wavelength:225nm

Wavelength repeatability: ≤ 0.05nm (deuterium lamp 656.1nm)

Colorimetric dish:2cm

USB/232 serial port