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Detection limit: 0.02mg/L(measurement 11 times blank calculation 3 times standard deviation)
Wavenumber range: 3400cm-1~2400cm-1(2941nm~4167nm)
Absorbance range: 0.0000~2.0000AU(transmittance 100~1%T)
Minimum detectable concentration: 0.001mg/L(enrichment extraction)
Maximum measured concentration: 10000mg/L(dilution measurement)
Instrument range: (0.05~100)mg/L
Repeatability: RSD≤1%(20-100mg/L oil standard sample determination 11 times)
Accuracy of measurement: The error is <±5%
Coefficient of association: R>0.999
Net Weight: 13KG
Technical principle:
According to the HJ637-2012 standard, the oil substances in the water were extracted with carbon tetrachloride, and the total extract was determined. After the extraction liquid was adsorbed by magnesium silicate, the polar substances such as animal and plant oil were removed, and the petroleum was determined. The contents of total extracts and petroleum were determined by the absorbance at bands of 2930cm-1 (stretching vibration of C-H bond in CH2 group), 2960cm-1 (stretching vibration of C-H bond in CH3 group) and 3030cm-1 (stretching vibration of C-H bond in aromatic ring), respectively A2930, A2960 and A3030 are calculated. The content of animal and vegetable oils is calculated as the difference between the total extract and the petroleum content.
Technical principle:
1, using Windows XP and Windows7 operating system control;
2, with measuring instrument correction coefficient function;
3, the use of advanced industrial serial technology;
4, the real three-wave number, infrared three-wave number spectrum is clear, the scale is accurate, can clearly display the absorption spectrum and absorbance generated by three wave numbers;
5. Automatically adjust the wavelength positioning of methylene 2930cm-1 of the instrument to achieve accurate measurement of the instrument;
6, the use of high-performance pyroelectric infrared detector, accurate collection of halogen light when the circuit formed pyroelectric current signals;
7, the correlation coefficient is good, measuring 0.5-5mgL,R>0.999.
Instrument features:
1, using Windows XP and Windows7 operating system control;
2, with measuring instrument correction coefficient function;
3, the use of advanced industrial serial technology;
4, the real three-wave number, infrared three-wave number spectrum is clear, the scale is accurate, can clearly display the absorption spectrum and absorbance generated by three wave numbers;
5. Automatically adjust the wavelength positioning of methylene 2930cm-1 of the instrument to achieve accurate measurement of the instrument;
6, the use of high-performance pyroelectric infrared detector, accurate collection of halogen light when the circuit formed pyroelectric current signals;
7, good correlation coefficient, measuring 0.5-5mgL,R> 0.999.
