VDI 2452 Blatt 3-1987 Gaseous air pollution measurement; measurement of fluoride ion concentration; sorption method with prepared silver balls and heated membrane filter
VDI 2449 Blatt 1-1970 Pruefkriterien von Messverfahren; Datenblatt zur Kennzeichnung von Analysenverfahren fuer Gas-Immissionsmessungen
VDI 2452 Blatt 3-1987 history
1987VDI 2452 Blatt 3-1987 Gaseous air pollution measurement; measurement of fluoride ion concentration; sorption method with prepared silver balls and heated membrane filter
1979VDI 2452 Blatt 3-1979 Gaseous air pollution measurement; measurement of fluoride ion concentration; sorption method with prepared silver balls and heated membrane filter