Indanthrene yellow paper (Box of 200 strips, 20 x 70mm)

• The sensitivity largely depends on the nature of the respective hydrocarbon

• For detection of oil in soil, press the paper firmly against the soil t

• In the presence of aluminum (Al3+), it shows bright red spots on a yellow background

• Color reaction: yellow to bright-red

• Limit of sensitivity: 10 mg/l Al

• The white paper turns brownish-yellow in the presence of ammonium ions or NH3

• This test paper is specific for the determination of NH4+

• Color reaction

• In the presence of antimony [Sb(III)], it shows orange-red spots on a yellow background

• Pentavalent antimony, i.e. Sb(V), has to be reduced to Sb(III) with metallic magn

• In petrol and fuel oil tanks, water accumulates over time building a layer at the bottom. To measure this layer the PE strip is fixed ont