1 Flashcards
Method for Glucose Determination:
-Based on the phosphorylation of glucose to produce 6-phosphogluconate
-most specific enzymatic method
HEXOKINASE METHOD
Method for Glucose Determination:
Based on the oxidation of B-D- glucose to D- gluconic- lactone and hydrogen peroxide
GLUCOSE OXIDASE
INDICATORS OF GLUCOSE OXIDASE:
Aminoantipyrine + Phenol
quinone imine dye complex formation is measured at 510-540 nm
Commonly used in Dry Chemistry
Red Product
COLORIMETRIC GLUCOSE OXIDASE METHOD (Saifer Gernstenfield Method)
Electrochemical detection
Electrode measures oxygen consumption
GLUCOSE OXIDASE AND FERROCENE (POCT)
Electrochemical detection
Electrode measures oxygen consumption
GLUCOSE OXIDASE AND FERROCENE (POCT)
Measures the rate of oxygen consumption
Rate of consumption= concentration of glucose
It can be utilized for serum, urine, and spinal fluid but not in whole blood sample
POLAROGRAPHIC GLUCOSE OXIDASE METHOD
The amount of NADH generated is proportional to the glucose concentration
GLUCOSE DEHYDROGENASE
Indicator: POCT: GDH
pyrroloquinoline-quinone
POCT: GDH
yellow
Ferrocyanide
POCT: GDH
Colorless
FERRICYANIDE
CHEMICAL METHODS:
Reduction of a yellow ferricyanide to a colorless ferocyanide by glucose
Inverse Colorimetry
FERRICYANIDE METHOD (HAGEDORN-JENSEN)
Chemical Method:
Condensation Method
Most Sensitive
ORTHO- TOLUIDINE (DUBOWSKI METHOD)
ortho-toluidine: sample is mixed with ___________ acid and then heated
Trichloroacetic
Chemical Method: based on the reduction of Cu2+ ions to Cu+ ions in the presence of reducing sugars.
NELSON-SOMOGYI
Chemical Method: based on the reduction of Cu2+ ions to Cu+ ions in the presence of reducing sugars.
NELSON-SOMOGYI