Thermo Scientific Orion AquaMate UV-Vis, Руководство пользователя

Страница: 87 / 213

Chapter 5
|
Orion AQUAfast Reagent Chemistry Instructions for Orion AquaMate
Thermo Scientific Orion AquaMate Spectrophotometer User Manual | 87
AC4P55 Manganese High Range Powder Pack Test
Periodate Oxidation Method
0.1 – 18 mg/l Mn (High Range)
1. Load and run the AC4P55 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. Add the contents of one Manganese Citrate Buffer Powder Pack straight from the foil into
the vial.
7. Close the vial tightly with the cap and swirl or invert several times to mix the contents.
8. Add the contents of one Sodium Periodate Powder Pack straight from the foil into the vial.
9. Close the vial tightly with the cap and swirl or invert several times to mix the contents. Wipe
the exterior of the vial.
10. Wait for a reaction period of 2 minutes.
11. Place the vial into the holder in the sample chamber and close the chamber door.
12. Press the Measure Sample function key to display the result in mg/l manganese.
Notes:
• This test is applicable for the determination of soluble manganese in water and
wastewater.
• Highly buffered water samples or extreme pH values may exceed the buffering capacity of
the reagents and requires sample pre-treatment. If samples were acidified for storing,
adjust the pH between 4 and 5 with 5 mol/l (5 N) sodium hydroxide before test. Do not
exceed pH 5, as manganese may precipitate.
• Interferences:
Interfering Substance Interference Level
Calcium Greater than 700 mg/l
Chloride Greater than 70,000 mg/l
Iron Greater than 5 mg/l
Magnesium Greater than 100,000 mg/l