OIL 450 Infrared Spectrometer for Oil Analysis

1. meet the standard

National Environmental Protection Standards of the People's Republic of China“HJ637-2012”Water quality and petroleumDetermination of animal and vegetable oils by infrared spectrophotometry

2. Technical Principle

according toHJ637-2012Standard: Extract oil substances from samples using carbon tetrachloride, determine total oil, and then adsorb the extract with magnesium silicate to remove polar substances such as animal and vegetable oils before determining petroleum. The total oil and petroleum content are determined by wave numbers, respectively2930cm^-1（CH₂Within the functional groupC-HThe stretching vibration of keys2960cm^-1（CH₃Within the functional groupC-HThe stretching vibration of keys) and3030cm^-1(In the aromatic ring)C-HThe absorbance at the spectral band of the stretching vibration of the keyA₂₉₃₀、A₂₉₆₀andA₃₀₃₀Perform calculations. The content of animal and vegetable oils is calculated based on the difference between the total extract and petroleum content.

3. Application field

Used for the determination of petroleum and animal and plant oils in groundwater, surface water, industrial wastewater, and domestic sewage

4Technical indicators and related parameter performance

Baseline stability:Real time automatic adjustment of zero point (eliminating the influence of baseline drift), the computer collects both the signal when the light source emits light and the signal when the light source goes out, achieving real-time automatic adjustment of zero point, simplifying operation and improving the long-term stability of the signal;

Software system: meets the usage method of using carbon tetrachloride as an extractant;

Calibration method:The instrument can be calibrated using both standard curves and coefficients, with multiple calibration methods to meet different environmental requirements;

Light source system: The service life of the light source can reach5000More than hours. The light source uses electrical modulation to regulate the light source technology, preventing the internal temperature of the instrument from affecting stability;

Method detection limit: When the sample volume is1000mlThe volume of the extraction solution is25mlAt this time, the detection limit is0.01mg/L；

Instrument detection limitDL≤0.04mg/L(Determination of carbon tetrachloride blank solution11Secondary3timesSD)；

Repeatability:30～40mg/LOil standard sample determination11timeRSD≤0.6%or0.5mg/Lwater sampleRSD≤5%The optical and electrical systems of the instrument are integrated and highly integrated, thereby improving the reliability and repeatability of the instrument;

Accuracy error: ≤3%;

Correction coefficient accuracy: using carbon tetrachloride as a reference solution, using4cmColorimetric dishes, measure separately2mg/L、5mg/L、20mg/L、50mg/L、100mg/LPetroleum standard liquid, error ±10%;

Scanning speed: Full spectrum scanning,30second/Secondly;

Basic measurement range:0.0～800mg/L

Minimum detectable concentration:0.01mg/L(Water sample concentration)

Maximum measured concentration:640000mg/L(Water sample concentration)

Linear correlation coefficientr﹥0.999

Wave number range:3400cm^-1～2400cm^-1(i.e2941nm～4167nm）

Wavelength accuracy: ±2 cm^-1

Wave number repeatability: ±2 cm^-1

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

Host dimensions:450mm(Long) ×310mm(Width) ×140mm(High)

Host weight:12kg

Warm Degree:-5-45℃

Relative humidity:20%-95%

Host power supply power:(220±22)V、(50±1)Hz、50VA