In the knotted mixing coil (MC) immersed in water bath of 60 °C, nitrate was reduced by VCl3 and reacted with Griess reagent to form a pink dye, which was monitored in the detection system (D) and the waste (W) was collected
in a waste bottle.
The detection system consisted of a “U” shaped flow cell of 1-cm path length, a laboratory-made cell holder, a white LED fixed as light source, a USB 2000 miniature fibre optic CCD spectrometer (www.oceanoptics.com) as detector,an done
QP 600-2-SR fibre optic (www.oceanoptics.com) connecting the cell holder and spectrophotometer.
Light absorption was mon-itored at 540 nm and 437 nm for detection and for correction of light intensity variation.
Detailed data processing procedures are described elsewhere
In the knotted mixing coil (MC) immersed in water bath of 60 °C, nitrate was reduced by VCl3 and reacted with Griess reagent to form a pink dye, which was monitored in the detection system (D) and the waste (W) was collectedin a waste bottle.The detection system consisted of a “U” shaped flow cell of 1-cm path length, a laboratory-made cell holder, a white LED fixed as light source, a USB 2000 miniature fibre optic CCD spectrometer (www.oceanoptics.com) as detector,an doneQP 600-2-SR fibre optic (www.oceanoptics.com) connecting the cell holder and spectrophotometer.Light absorption was mon-itored at 540 nm and 437 nm for detection and for correction of light intensity variation.Detailed data processing procedures are described elsewhere
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