1、 Instrument Introduction:

Testing indicator: Petroleum (oil content in water)

Instrument name: UV Oil in Water Analyzer (equipped with automatic petroleum extraction instrument)

Model: Dejun Instrument OIW-970

Detection principle: UV spectrophotometry

Extraction agent: n-hexane

Applicable reference materials: Marine Environmental Monitoring Petroleum Composition Analysis Reference Materials (HJ Oil Standard, National Standard 10000759), GBW(E)080913，1000mg/L；

Execution standard: New national standard for petroleum products "HJ 970-2018 Water quality - Determination of petroleum products - UV spectrophotometric method"

Manufacturer: Guangzhou Dejun Instrument Co., Ltd

Instrument Introduction:

Dejun Instrument OIW-970 UV spectrophotometry oil analyzer is a high-precision and highly reliable UV spectrophotometry laboratory water oil analyzer developed specifically for the new national standard for petroleum "HJ 970-2018 Water Quality Determination of Petroleum by UV spectrophotometry". It uses n-hexane as the extraction agent and is equipped with an automatic liquid-liquid extraction system. It is used for the determination of petroleum in surface water, groundwater, and seawater, with a range of 0.008-100mg/L and a detection limit of 0.008mg/L. OIW-970 does not require manual oscillation extraction, one click measurement, direct reading of concentration, convenient, fast, stable and reliable. It is widely used in environmental protection and monitoring, marine and maritime affairs, hydrology and water conservancy, as well as third-party testing institutions, enterprises and other testing units.

Detection principle:

OIW-970 UV spectrophotometer is used to extract oil substances from samples with n-hexane under pH ≤ 2 conditions. After filtration and dehydration through anhydrous sodium sulfate sand core funnel, animal and vegetable oils are removed by column adsorption using magnesium silicate column. OIW-970 is used for one click measurement at 225nm wavelength, and the instrument is directly adjusted to read the standard curve of petroleum concentration vs. absorbance.

Applicable water samples: surface water (including drinking water sources), groundwater, and seawater.

Applicable users: environmental protection and supervision, marine and maritime affairs, hydrology and water conservancy, university research institutes, third-party testing institutions, water treatment plants, sewage treatment plants, and various industrial enterprises.

2、 Performance characteristics:

1. Adopting UV spectrophotometry to meet the new national standard for petroleum products, HJ 970-2018 Water Quality - Determination of Petroleum Products - UV spectrophotometry method.

2. Three major detection functions:

(1) Quantitative detection of petroleum: calling standard curves and extraction ratios, one click measurement, direct reading of oil concentration in water, no need for manual calculation;

(2) Purity determination of extractant: rapid determination of qualified/unqualified n-hexane purity to reduce the interference of extractant errors;

(3) Spectral measurement: Determine the spectra of samples, oils, and extractants for easy traceability and verification analysis of measurement values.

3. The instrument supports the creation, storage, and retrieval of multiple standard curves, and supports three methods for establishing calibration curves, making it convenient for users to calibrate the instrument.

4. 5-inch color LCD touch screen, user-friendly interface, intuitive and easy to understand menu navigation, convenient for user sample testing and parameter setting.

5. Equipped with advanced automatic liquid-liquid extraction system, it achieves fully automatic liquid addition, extraction, separation, dehydration and adsorption, reducing manual operation and contact with toxic reagents, effectively ensuring the safety of experimental personnel.

6. Equipped with a 20mm automatic five cell tank, it supports single machine instrument and PC online control, achieving one click automatic calibration and automatic switching of multiple samples for detection.

7. Diverse output forms: Color LCD display, support for multiple printers, and powerful software for sample measurement and data processing when connected to a computer.

8. Suitable for commercially available n-hexane extractants and HJ oil standard (national standard 10000759) by UV spectrophotometry, with traceable quantity values.

3、 Technical parameters:

1. Testing indicators: petroleum;

2. Detection principle: UV spectrophotometry;

3. Execution standard: "HJ 970-2018 Determination of Water Quality and Petroleum by UV spectrophotometry";

4. Wavelength range: Measurement wavelength 225nm, full wavelength 190-1100nm;

5. Measurement range: 0.008-100mg/L (oil content in water);

6. Detection limit: 0.008mg/L;

7. Repeatability: ≤ ±2%；

8. Linear: R>0.999；

9. Measurement error: ≤ ±2%；

10. Three major functions: quantitative determination of petroleum products (one click determination, no calculation required), extraction agent determination (rapid determination of n-hexane purity), and spectral measurement (traceability of sample oil extraction dose values);

11. Applicable reference materials: Marine Environmental Monitoring Petroleum Composition Analysis Reference Materials (HJ Oil Standard (National Standard 10000759) GBW (E) 080913);

12. Calibration method: The instrument can create, store, and call multiple standard curves, supporting three calibration methods: calibration of standard samples (2-10 points), input of standard samples, and input of equation coefficients. It also supports zero crossing, neutral line, and second-order fitting methods.

13. Extraction agent: n-hexane, transmittance ≥ 90%;

14. Extraction method: (25mL n-hexane: 500mL water sample) automatic liquid-liquid extraction;

15. Automatic liquid-liquid extraction system: Extract 1-3 samples simultaneously for 5 minutes. The sampling bottle is directly used for extraction, with automatic addition of extraction agent, automatic liquid-liquid extraction, automatic separation and collection, and automatic cleaning. It is equipped with an anhydrous sodium sulfate dehydration column and a magnesium silicate adsorption column. Fully enclosed and non-volatile, reducing manual operation and contact with toxic reagents.

16. Sample pool rack: 20mm automatic five cell pool, supporting instrument side single machine and PC side computer online control, one click automatic calibration and multi sample automatic switching detection.

17. Colorimetric dishes: 6 20mm quartz colorimetric dishes;

18. Operation interface: 5-inch color LCD touch screen (supporting full keyboard input of numbers and letters), intuitive and easy to understand human-computer interaction interface, convenient operation, supporting 6 languages including Chinese, English, German, French, Spanish, and Portuguese.

19. Operating System: The instrument comes with its own operating system, which can be operated on a single color touch screen; It can also be connected to a computer or PC for online operation, equipped with powerful PC data processing software.

20. Data storage: The instrument has built-in memory (236 KB), USB storage (supports unlimited external expansion), and PC upload and save.

21. Power on self-test: light source, filter disc, sample holder, calibrated dark current, calibrated wavelength, checked energy, and checked system baseline to ensure stability and reliability.

22. Light source: Long life deuterium lamp, tungsten lamp;

23. Detector: Silicon photodiode;

24. Wavelength accuracy: ± 0.5nm;

25. Luminous range:- 0.301-3A，0-200%T，0-999.9C；

26. Accuracy of photometry: ± 0.003A@0.5A ，± 0.006A@1A ， ±0.5%T@0-100%T；

27. Printers: Serial port printer, USB printer, PC printer, multiple options;

28. Clock: Built in real-time clock, accurately recording data testing time;

29. Power supply: 100-240VAC, 50/60Hz, 120W;

30. Size and weight: Oil gauge 456mm × 360mm × 185mm, 11 kg.

4、 Configuration List:

1. OIW-970 UV spectrophotometer (color touch screen operating system), 1 set;

2. OIW-970 PC data processing software, 1 set (optional)

3. 20mm automatic five link sample holder, 1 unit;

4. 20mm quartz colorimetric dish, 6 pieces/set;

5. Petroleum automatic liquid-liquid extractor, 1 unit;

6. Centrifuge, 1 unit;

7. Magnesium silicate adsorption column, 10 pieces;

8. Large capacity pipette, 1 unit;

9. Adjustable pipette, 1 unit;

10. Petroleum standard substance: HJ oil standard (national standard substance 10000759) GBW (E) 080913, 5 units.

Automatic UV spectrophotometer oil analyzer