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Nickel Ion NO.291 Ni Performance Measuring Range (5) to 50 mg/L Sampling Time 3 minutes Detecting Limit 5 mg/L Colour Change White → Red Reaction Principle Ni + Dimethyl glyoxime → 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 20 mg/L - No (1000mg/L) Al 30 mg/L - No (1000mg/L) Co 3 mg/ L + Greenish brown (20 mg/L) CN- 10 mg/L - No (100mg/L) Fe2+ 5 mg/L + Brown (60 mg/L) Fe3+ 100 mg/L - No (1000mg/L) Cu 5 mg/L + Reddish brown / yellowish Green (50mg/L)
