UV spectrophotometer UV900

1、 Compliant with standards

Compliant with the national standard "HJ970-2018 Determination of Water Quality and Petroleum by UV spectrophotometry"

2、 Technical principles

According to HJ970-2018 standard, n-hexane extraction is dehydrated with anhydrous sodium sulfate, and then adsorbed with magnesium silicate for animal and vegetable oil. The absorbance is measured at a wavelength of 225 nm, which conforms to Lambert Beer's law.

3、 Department using the instrument

Environmental monitoring systems, petrochemicals, hydrology and water conservancy, tap water, sewage treatment plants, thermal power plants, steel enterprises, scientific research and teaching in universities, agricultural environmental monitoring, railway environmental monitoring, automobile manufacturing, marine environmental monitoring, transportation environmental monitoring, environmental research and other testing rooms and laboratories are used.

4、 Application scope of the instrument

This standard is applicable to the determination of petroleum in surface water, groundwater, and seawater.

When the sampling volume is 500 ml, the extraction solution volume is 25 ml, and a 2 cm quartz colorimetric dish is used, the detection limit of the method is 0.01 mg/L, and the lower limit of determination is 0.04 mg/L.

5、 Technical indicators

Technical indicators of the project
The detection limit of the instrument is 3SD ≤ 0.02mg/L (measure 11 times blank and calculate 3 times standard deviation)
Method detection limit 0.001mg/L
Basic measurement range: 0.0-800mg/L
Repeatability RSD ≤ 1% (11 measurements of 4-20mg/L oil sample)
Accuracy error<± 2%
Correlation coefficient R>0.9995 (0, 2, 4, 8, 12, 16, 20mg/L)
Scanning speed: single wavelength scanning for 1 second/time, 225nm characteristic peak scanning for 15 seconds/time
Wavelength range 190 nm~1100 nm
The absorbance range is 0.0000-2.0000 AU (i.e. transmittance of 100-1% T)
Wave number accuracy and repeatability ± 0.5cm-1
Measure the transmittance of n-hexane at 225nm, which is greater than 95%
Temperature and humidity range: 1 ℃ -40 ℃, humidity ≤ 90%
The external dimensions of the host are 45cm × 34cm × 30cm (length, width, height)
Use power supply (220 ± 22) V, (50 ± 1) Hz, 50VA