产品名称
Oxygen Test, titrimetric, for use with MQUANT® titration pipette
analyte chemical class(es)
oxygenates
Quality Segment
compatibility
for use with MQUANT® titration pipette
detection method
titrimetric
storage temp.
15-25°C
General description
Method: titrimetric, acc. to Winkler, with titration pipette MQuant®
The sustainability of biological processes in natural waters is essentially depended on a sufficient oxygen content. The oxygen present in water is also consumed by chemical processes and by microorganisms. This MQuant® Oxygen test (formally MColortest®) is suitable for the titrimetric determination using a graduated syringe.
It can be used in:
Method
In alkaline solution, dissolved oxygen oxidizes manganese(II) ions to form manganese(IV) hydroxides (“oxygen fixation”). In strongly acidic solution these yield manganese(III) ions, which in turn oxidize iodide ions to form iodine. This is then titrated with sodium thiosulfate solution against starch as the indicator until the solution becomes entirely colorless. The oxygen concentration is determined from the consumption of titration solution (iodometric determination acc. to Winkler). The oxygen consumption is calculated as the difference between the oxygen content measured immediately after sampling and that measured after n days (n = 2 to 5).
It can be used in:
- Groundwater, drinking water, and surface water, seawater
- Aquarium water, waters from aquaculture
- Industrial water and wastewater
- Boiler water and boiler feed water
- Beverages
Method
In alkaline solution, dissolved oxygen oxidizes manganese(II) ions to form manganese(IV) hydroxides (“oxygen fixation”). In strongly acidic solution these yield manganese(III) ions, which in turn oxidize iodide ions to form iodine. This is then titrated with sodium thiosulfate solution against starch as the indicator until the solution becomes entirely colorless. The oxygen concentration is determined from the consumption of titration solution (iodometric determination acc. to Winkler). The oxygen consumption is calculated as the difference between the oxygen content measured immediately after sampling and that measured after n days (n = 2 to 5).
Legal Information
MCOLORTEST is a registered trademark of Merck KGaA, Darmstadt, Germany
MQUANT is a registered trademark of Merck KGaA, Darmstadt, Germany
signalword
Danger
wgk
WGK 3
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Met. Corr. 1 - Repr. 1B - Skin Corr. 1A - STOT RE 2
target_organs
Brain
存储类别
6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects