Sum parameters
Sum parameter is a term used in chemical analysis for the comprehensive description of action and material parameters .
A cumulative parameter summarizes one or more groups of substances under defined analysis conditions, but does not allow information on individual substances (also called individual parameters). The advantage lies in the relatively simple overall recording and specification of environmentally harmful substances in environmental samples.
The following sum parameters are, for example, common (not always limited to one area):
Sum parameters in water analysis
These sum parameters are used to a large extent in environmental analysis to describe the quality of water samples ( drinking water , surface water , groundwater , wastewater ). This includes the content of organic compounds, organically bound halogens and the salt content. Here, the organically bound halogens (these can arise, for example, through the chlorination of drinking water) are often summarized under the heading of group parameters.
Sum parameters:
- Biochemical oxygen demand (BOD)
- Permanganate Index (PI)
- Chemical Oxygen Demand (COD, occasionally CSV - Chemical Oxygen Demand, COD)
- Total Organic Carbon ( Total Organic Carbon TOC)
- Total Dissolved Organic Carbon (DOC)
- conductivity
Group parameters
- Adsorbable organically bound halogens , AOX (X stands for halogens)
- Extractable Organically Bound Halogens , EOX
- Blow-out (volatile) organically bound halogens (POX, from "purgable")
Sum parameters in exhaust air analysis
- Volatile organic compounds without methane (Non methane volatile organic compounds, NMVOC )
- Chlorinated hydrocarbons , CHC
- Nitrogen oxides , NO x (sum of nitrogen monoxide, NO, and nitrogen dioxide, NO 2 )
- Polycyclic aromatic hydrocarbons (PAH, PAH)
- Particles with a diameter of less than 10 µm, PM 10
Sum parameters in solids analysis
literature
- Georg Schwedt: Pocket Atlas of Analytics. 2nd Edition. Thieme, Stuttgart, New York 1996, ISBN 3-527-30870-9 .