Chapter 5
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Orion AQUAfast Reagent Chemistry Instructions for Orion AquaMate
Thermo Scientific
Orion AquaMate Spectrophotometer User Manual
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69
AC2099 Chlorine Dioxide Tablet Test
DPD Method
0.02 – 11 mg/l ClO
2
Chlorine Dioxide Measurement in Absence of Chlorine
1.
Load and run the AC209924 method.
2.
Fill a clean AQUAfast 24mm round vial, Cat. No. AC2V24, with 10 ml of sample. Close the
vial tightly with the cap. Wipe the exterior of the vial.
3.
Place the vial into the holder in the sample chamber and close the chamber door.
4.
Press the Measure Blank function key to measure the blank.
5.
Open the sample chamber door and remove the vial from the holder.
6.
Empty the vial, leaving a few drops of sample remaining in the vial.
7.
Add one DPD No. 1 Tablet straight from the foil into the vial. Crush the tablet with a clean
stir rod.
8.
Add sample to the 10 ml mark on the vial.
9.
Close the vial tightly with the cap and swirl or invert several times until the tablet is
dissolved. Wipe the exterior of the vial.
10.
Place the vial into the holder in the sample chamber and close the chamber door.
11.
Press the Measure Sample function key to display the result in mg/l chlorine dioxide.
Chlorine Dioxide Measurement in Presence of Chlorine
1.
Load and run the AC209924 method.
2.
Fill a clean AQUAfast 24mm round vial, Cat. No. AC2V24, with 10 ml of sample. Close the
vial tightly with the cap. Wipe the exterior of the vial.
3.
Place the vial into the holder in the sample chamber and close the chamber door.
4.
Press the Measure Blank function key to measure the blank.
5.
Open the sample chamber door and remove the vial from the holder.
6.
Empty the vial, leaving a few drops of sample remaining in the vial.
7.
Add one DPD No. 1 Tablet straight from the foil into the vial. Crush the tablet with a clean
stir rod.
8.
Fill a second clean AQUAfast 24mm round vial with 10 ml of sample. Add one Glycine
Tablet straight from the foil into the vial. Crush the tablet with a clean stir rod. Close the vial
tightly with the cap and swirl or invert several times until the tablet is dissolved.
9.
Transfer the contents of the second vial into the first vial.
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