4.3 Reagent Strip testing (pH)

Question 1

Principle for pH

a. Sorensen’s Protein Error of Indicators
b. Double sequential enzyme reaction
c. Double Indicator Reaction
d. Na(Sodium) Nitroprusside reaction
e. Pseudoperoxidase activity of heme
f. Diazo reaction
g. Greiss’ Reaction
h. Ehrlich’s reaction

Answer 1

c

Question 2

Reagents for pH reagent strips:

a. M&C: Methyl Red & Bromthymol Blue
b. Tetrabromophenol blue
c. GOD
d. Sodium nitroprusside
e. Dichloroaniline diazonium salt
f. Pdimethylaminobenzaldehyde
g. p-arsanilic acid tetrahydrobenzo-quinolinol
h. Derivative pyrrole amino acid ester

Answer 2

a

Question 3

Color reaction and reading time for pH:

_____ ->______->_____

a. Yellow red Blue
b. Blue Yellow red
c. Red Yellow Blue

Answer 3

c

Question 4

Reading time for pH

a. 30s
b. 45s
c. 60s

Answer 4

c

Question 5

Detection limit:

5-8.5

a. Multistix
b. Chemstrip

Answer 5

a

Question 6

Sources of interference:

Old specimen

a. F-Increase
b. F-Decrease

Answer 6

a

Question 6

Detection limit:

5-9

a. Multistix
b. Chemstrip

Answer 6

b

Question 6

Sources of interference:

Runover from adjacent pads

a. F-Increase
b. F-Decrease

Answer 6

b