So the absorbing wavelength is selected,the operating condition optimized,and the quantitative and qualitative determination method on Polyoxin B by HPLC-DAD established.
Put forward the theory about the apparent hathochromic or hypsochromic shift on absorption peak caused by the constructive and the destructive interferences.
In this paper,the contents of herbicide bifenox weredeterminated by the differential UV spectrophotometry at 280nm,and the reference solution was that the 40.
Well equipped, these instruments feature: multiple entrance and exit ports, high precision wavelength drives, extended range operation, Echelle, and oversize grating mounting capabilities.
The white light comes from exciplex emission at the solid-state interface between (dppy)BF and NPB in addition to the exiton emission from NPB and (dppy)BF respectively.
The wavelength division effect of grism in a multi-wavelengths optical system is discussed, the grism consist of a tranditional optical prism and a diffraction optical phase grating.
The two transpolar shortwave time signal circuits,Moscow and Irkutsk to the Great Wall Station in Antarctica, are used to study the fading characters for shortwave long circuit.
The coloring matter are separated by YWG-C18,the best wave is found by DAD detecter, the quantitative method is standard curve , the result is accurately ,the method are used simply.