Dual-channel microfluidic sensor based on side-hole fiber with two long-period fiber gratings

We propose and demonstrate a dual-channel microfluidic sensor based on a side-hole fiber(SHF)with two longperiod fiber grating(LPFG)structures.There are two air holes in the SHF,which are natural microfluidic channels.We fabricate two LPFGs(long-period gratings LPG-A and LPG-B)in the SHF with the resonance wavelengths of 1268.7 nm and 1385.8 nm,respectively.Results show that the refractive index sensitivities of LPG-A and LPG-B are?76.0 nm/RIU and?71.1 nm/RIU,respectively.One can measure the refractive index of liquid samples in two channels simultaneously.The proposed dual-channel microfluidic sensor has advantages of good linearity response,fluidic technology compatibility,and easy light input/output coupling and system integration,which helps the sensor to have a potential application in environmental detection and food safety detection.     

同步荧光光谱法监测按芳环数分离重质油中的芳烃

采用同步荧光光谱法监测了液相色谱法以氧化铝作固定相将重质油中的芳烃按芳环数分离的分离过程。在同步荧光光谱的监测下，选择了液相色谱分离的合适进样量和分段梯度洗脱溶剂强度，使得减压馏分油和减压渣油中的芳烃都可较好地按芳环数进行分离。