OIL 400PLUS Infrared Spectrometer for Oil Analysis

Compliant with standards

National Environmental Protection Standard of the People's Republic of China "HJ637-2018" Water Quality - Determination of Petroleum and Animal and Vegetable Oils - Infrared Spectrometric Method

Technical principles

According to HJ637-2018 standard, under the condition of pH ≤ 2 in water samples, extract with tetrachloroethylene and determine the oil content; After removing polar substances such as animal and vegetable oils by adsorbing the extract with magnesium silicate, determine the petroleum content. The content of oil and petroleum is determined by wave numbers of 2930cm-1 (stretching vibration of C-H bond in CH2 group)

Calculate the absorbance A2930, A2960, and A3030 at 2960cm-1 (stretching vibration of C-H bond in CH3 group) and 3030cm-1 (stretching vibration of C-H bond in aromatic ring) based on the correction coefficient; The content of animal and vegetable oils is the difference between the content of oil and petroleum.

application area

Determination of petroleum, animal and plant oils in industrial wastewater and domestic sewage

Technical indicators and related parameter performance

Detection limit: When the sample volume is 500ml and the extraction solution volume is 50ml, it meets the method's detection limit requirement of 0.06mg/L;

Wave number accuracy and repeatability: ± 0.5cm-1;

Sample determination repeatability: meets the requirements of RSD ≤ 0.6% for 11 consecutive determinations of ≥ 5mg/L oil standard samples and RSD ≤ 5% for 0.5mg/L water samples;

Accuracy requirement: The measured values of certified reference materials should be within the theoretical range, and the relative error between the measured values of any hydrocarbon ratio petroleum standard sample and the standard values should be within ± 10%;

Calibration method: equipped with coefficient calibration function and standard curve calibration function;

Baseline stability: equipped with zero point real-time automatic adjustment function;

Automatic positioning calibration function: Oil samples above 30mg/L can be automatically calibrated at 2930cm-1, 2960cm-1, and 3030cm-1;

Equipped with self checking and result judgment functions: capable of generating instrument self checking energy information log recording function, capable of software judging whether the sample exceeds the standard prompt function;

Quality testing function for tetrachloroethylene: According to the requirements of standard HJ637-2018, the quality of tetrachloroethylene is tested and automatically judged;

Scanning speed: Full spectrum scanning, 30 seconds/time;

Qualitative method: Real time continuous scanning spectrum of the sample for qualitative analysis;

Basic measurement range: 0.0~800mg/L;

Wave number range: 3400cm-1 to 2400cm-1 (i.e. 2941nm to 4167nm);

Absorption range: 0.0000-2.0000 AU (i.e. transmittance of 100-1% T);

Software system: equipped with HJ637-2018 method requirements;

Light source system: equipped with a light source performance with a service life of over 5000 hours;

Data storage: Instrument configuration database, capable of storing instrument self-test status information and each test content (operator, time, test results, sample name, etc.);

Temperature: -5 ℃ to 45 ℃;

Relative humidity: 20% to 95%;

Host power supply: 220V 50Hz.