Abstract: The present disclosure relates to an electron transfer mediator comprising the osmium complex or a salt thereof, a reagent composition for an electrochemical biosensor, and an electrochemical biosensor, where the osmium compound or its salt maintains a stable oxidation-reduction form for an extended time period, a capacity to react with oxidoreductase being capable of performing the redox reaction of the target analytes, and no effect of oxygen partial pressure.

Abstract: A sensor module according to an embodiment of the present invention is connected to a connector module, which transfers water quality information to an electronic device such that the same is displayed on the electronic device, and thereby acquires water quality characteristics for calculating the information. The sensor module is separably connected to the connector module and can be connected to any connector module. The connector module comprises an electronic device communication portion for transferring the water quality information to the electronic device, a body-proximate communication portion capable of wirelessly communicating with the sensor module, and a wireless power transmitting portion for wirelessly supplying the sensor module with power.

Abstract: The present disclosure relates to an electron transfer mediator comprising the osmium complex or a salt thereof, a reagent composition for an electrochemical biosensor, and an electrochemical biosensor, where the osmium compound or its salt maintains a stable oxidation-reduction form for an extended time period, a capacity to react with oxidoreductase being capable of performing the redox reaction of the target analytes, and no effect of oxygen partial pressure.

Abstract: The present invention relates to a cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives of the following formula 1, process for preparation and use thereof. The cholanic acid ring based 4-(trifluoroacetyl)phenyl derivatives of the present invention may be used as a host material in the host-guest chemistry, in detail as a material for ion sensors, optical sensors, gas sensors, biosensors, chromatographies, photostimulated ion-binding resins, ion exchange resins and organic reactions. (In the above formula 1, R, R1, R2, R3 and n are defined in the specifications).