Meeting the standard:
Conform to national standard“HJ637-2012 water quality the determination of petroleum and animal and plant oil Infrared photometric method”
Technical principle:
According to HJ637-2012 standard, extract the oil material in the water using tetrachloromethane, measure the total extracts, extract liquor adsorb via adsorb magnesium silicate, after removing polar material such as the animal and plant oil, determine oil type. The total extracts and the content of petroleum are calculated by absorbance A2930,A2960 and A3030 in the spectrum band ,wave number 2930cm-1(stretching vibration of C-H key in CH2 group ), 2960cm-1(stretching vibration of C-H key in CH3group), 3030cm-1(stretching vibration of C-H key in aromatic nucleus ).The content of animal and plant oil are calculated by the difference of total extractor and oil content.
Using department of instrument:
Environment monitor system, petrochemical, hydrology and water conservancy, water supply company, sewage treatment works, thermal power plant, iron and steel enterprise, teaching and research work in university, agricultural environmental monitoring, Railway environmental monitoring, automobile making, marine environmental monitoring, transport environment monitoring, environmental scientific researches, inspection room, used in laboratory.
Instrument application range:
The equipment is mainly used in the measurement of oil content in the surface water, groundwater, industry waste water, which also can be used in the oil monitoring of smoke in catering industry and monitoring of oil content in the solid. This instrument is professional instrument to measure the oil content in water, gas, solid.
Technical index：
Item | Description |
Detection limit | 0.02mg/L(calculate 3 times standard deviation measuring 11 times blank) |
wave-number range | 3400cm-1～2400cm-1(2941nm～4167nm) |
Absorbency range | 0.0000～2.0000AU (transmittance 100～1%T) |
Minimum detectable concentration | 0.001mg/L (enrichment extraction method) |
Maximum measured concentration | 10000mg/L (dilution gaging) |
Instrument measurement range | （0.05～120）mg/L |
Repeatability | RSD≤1% (20-100mg/L Oil sample determined 11 times) |
Measurement accuracy | error <±2 % |
Related coefficient | R>0.999 |
The wave number accuracy and wave number repeatability | ±1cm-1 |
Main machine net weight | 13kg |
Power supply | (220±22)V, (50±1)Hz,50VA |
temperature and humidity | Temperature range: 1℃-40℃, humidity≤80﹪ |
Main machine external dimension | 450mm×350mm×130mm |
Main instrument characteristics:
1. Using Windows XP, vstart or Windows 7 operating system control.
2. Have the function of measuring instrument correction coefficient.
3.Adopt advanced USB2.0 interface technology.
4. It is suitable for oil detection in the water on field spots after installed UPS, which also could be installed extract unit to upgrade to fully automatic infrared spectral oil analyzer.
5. True three wave number, clear infrared three wave spectrum diagram, accuracy scale, could clearly display absorb spectrum diagram and absorbance produced by three wave numbers.
6. To inspect light transmittance and purity of extraction agent, can distinguish various distractions
7. Electric speed controller , replacing light source machinery switch, improve instrument reliability.
8. Adopt high performance pyroelectric infrared detectors, accurately gather the signal of pyroelectric current formed in the circuit when halogen lights are lighting and out.
9.Good related coefficient, measurement 0.5-5 mg\L,R>0.999.
10. Have the function of automatic statistical analysis, spectrogram display, storage, printing, etc
