2.2.7. Biosensors: Clinistrips & Glucometers

define biosensor

an analytical device that uses a biological molecule to detect the presence of a specific chemcial molecule

what is a biosensor used for?

to determine presence and/or concentration of analyte

what are Clinistrips used to detect?

presence and concentration of glucose in urine

what enzyme is immobilsed on a Clinistrip?

glucose oxidase

what type of result is produced by Clinistrip?

qualitative

what are glucometers used to detect?

presence and concentration of glucose in blood

what type of result is produced by glucometers?

quantitative

what are the advantages of any type of biosensors?

specificity, quantitative, only small sample needed, rapid results

what is the advantage of biosensors - colour change?

low skill required

what arise the disadvantage of biosensors - colour change?

subjective result based on colour charts rather than absolute value

what are the advantages of biosensors - electrical signal ?

objective, quantitative result

what are the disadvantages of biosensors - electrical signal?

higher skill required