Ammonium test 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

• 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

• Arsenic in solutions has to be converted into AsH3 with Zn/acid and purged from the solution. The arsine is detected directly at the boundary layer between water and air

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