Performance

Measuring Range

(5) to 50 mg/L

Sampling Time

5 minutes

Detecting Limit

1.0 mg/L

Colour Change

White → Orange

Reaction Principle

Fe²⁺ + 1,10 Fenantoroline (White) → Complex compound

Shelf Life

3 Years

Corrections for temperature & humidity

Unnecessary

Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change colour by itself to

Zn

5 mg/L

+

No (100mg/L)

Co

5 mg/L

+

Orange (1mg/L)

CN^-

20 mg/ L

-

No (100mg/L)

^Fe3+

50 mg/L

+

Pale orange (50 mg/L)

^CU+

5 mg/L

-

Pale orange (1 mg/L)

CU²⁺

10 mg/L

+

Pale blue (50 mg/L)

 Ni

 5 mg/L

+

 No (100mg/L)

 Mn

 50 mg/L

-

 No (100mg/L)

 PO4^3-

 100 mg/L

 No

 No (100mg/L)