Aflatoxin and sulfanilamide drug light derivatization device
A technology of sulfonamides and aflatoxins, applied in the field of optical detection, can solve the problems of complex weaving of derivative tubes, short light source life, and high price, and achieve easy disassembly and replacement of parts, reduced band broadening, and low cost Effect
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Embodiment 1
[0044] A high-performance liquid chromatography (HPLC) post-column optical derivatizer, the excitation light source is 3 high-power ultraviolet LEDs with a central wavelength of 365nm, the divergence angle is 120°, and the rated current is 500mA; the distance between the ultraviolet LED light source and the derivatization reaction tube is 5mm; The reaction tube is a highly transparent FEP tube with an inner diameter of 0.35mm, an outer diameter of 1.6mm, and a length of 1.5m. The volume of the derivative pool is 144μL, and the distance between the derivative reaction tube and the reflector is 4mm; the reflector is a stainless steel polished plate; the material of the LED substrate and heat sink The material of the derivative frame is metal aluminum; the material of the metal rod is stainless steel. The photochemical derivatizer was connected with AccuOpt FD-1200S fluorescence detector (Dalian Kemei Precision Instrument Co., Ltd.) to evaluate its performance. The liquid chromat...
Embodiment 2
[0049] The photochemical derivatizer as described in Example 1 was combined with Shimadzu RF-20A fluorescence detector to analyze and detect 4 kinds of sulfa drugs. RF-20A has an excitation wavelength of 230nm and an emission wavelength of 400nm.
[0050] Experimental results: 5ppb sulfadiazine (SDZ) was injected, and RF-20A was not detected when the photochemical derivatizer was not connected; after the photochemical derivatizer was connected, 5ppb sulfadiazine (SDZ) could be detected, and the detection signal-to-noise ratio was 15.
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