Redox potential gradient field detector has detector substance comprising oxide compounds on dark coloured humic substance substrate

摘要

A redox potential gradient field detector has a detector substance comprising Aluminium, Silicon, Titanium or Zirconium oxide, or compounds on a dark coloured humic substance substrate supported by textile, paper or Aluminium foil. Independent claims are included for detectors using insoluble sulphates, iron oxide and manganese oxide compounds and for detector manufacturing processes using hydrolysis of alkali compounds.