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Indicator: 3 ~ 20 mg/L
Measuring Range: 3 ~ 20 mg/L
Sampling Time: 3 minute
Colour Change: Pale orange → Reddish purple
Reaction Principle: Zn + Indicator → Reddish purple complex compound
Nr. of tests: 10
| Measuring Range | 3 to 20 mg/L |
| Sampling Time | 3 minutes |
| Detecting Limit | 0.5 mg/L |
| Colour Change | Pale orange → Reddish purple |
| Reaction Principle | Zn + Indicator → Reddish purple complex compound |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Water temperature correction is necessary |
| Store the tubes at cool and dark place. | |
| Substance | Concentration | Interference | Change colour by itself to |
| CN- | ≧ 10 mg/L | + | No ( ≦ 100mg/L) |
| Fe2+ | ≧ 1 mg/L | + | Reddish purple ( ≧ 3mg/L) |
| Fe3+ | ≧ 2 mg/ L | + | No ( ≦ 100mg/L) |
| Ni | ≧ 2 mg/L | + | Purple(whole layer) ( ≧ 2mg/L) |
| Cu | ≧ 0.1 mg/L | + | Reddish purple ( ≧ 0.1mg/L) |
| Mn | ≧ 0.5 mg/L | + | Purple ( ≧ 3mg/L) |
| Pb | ≧ 0.5 mg/L | + | No ( ≦ 100mg/L) |
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Dissolved sulphide detector tube
211H / 211M / 211 / 211LL
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Liquid detector tube
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