Review on Hanna Instruments Calibration Checking Nitrite by Ken Coste
Nice to have
One of the bottles has a pretty good scratch, not what you need with a colorimeter, I'll just swap it out for a new bottle. When I tested my HI736 tester with this 100ppb certified standard, I got 80/82/80ppb in three tests. I was expecting something closer to 100ppb. 20% variance is a lot!
- Industrial and scientific
- Expensive
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