Turbidity Flashcards
1
Q
Max holding time
A
48 hours R, immediate analysis recommended.
2
Q
Standards/ reagent Exp
A
1 year after opening or manufacturers exp date.
3
Q
Frequency of calibration
A
every 3 months or before drinking water analysis.
4
Q
Frequency of Secondary Standard verification
A
Once per shift
5
Q
How many secondary standards are required?
A
Two (0-2 NTU and 0-20 NTU)
6
Q
How must test cells be stored?
A
Filled with DI water, and clean.
7
Q
Acceptance criteria of standard verifications (0-1 and 0-20 NTU)
A
+/- 10 %
