Thanks the buffer reagent, the sample is adjusted to pH between 5 and 6. Then, the addition of Azomethine-H & Ascorbic acid, they react with Boron giving a green-yellow color that is measured at 420nm.
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The method is accurate and sensitive. The range is linear up to 2 ppm and higher ranges can be obtained diluting the sample.
Range
From 0 to 100 ppb / 500 ppb / 1000 ppb / 2000 ppb.(Adjustable higher concentrations adjusting reagents.)
Accuracy
±2%
Repeatability
±2%
Resolution
0,1 ppb
Analysis time
around 30 minutes
Calibration
two point
LED Wavelength
420 nm
Reagent 1 Consumption
2.2 ml / analysis - 2.0L / month
Reagent 2 Consumption
4.2 ml / analysis – 3.5 L / month (Monthly consumption calculated assuming 1 analysis per hour)