How do you test for H2S and SO2 ? Please !?

Answer 1

Some context here would be helpful.

What concentrations do you need to test for? For dangerous concentrations to humans, you could probably get away with Draeger tubes. For smaller concentrations, you can use gas chromatography, although you might need a specially designed instrument. For even smaller concentrations, you could use a gas analyzer that's essentially a mass spectrometer.

Answer 2

What do you mean ?
H2S gas is burned to SO2 according to the reaction::
3 H2S + 1.5 O2 ® 2 H2S + SO2 + H2O
The remaining part of H2S reacts subsequently with SO2 to form S in the thermal and catalytic stages according to the reaction: 2 H2S + SO2 ® 3/n Sn + 2 H2O (2). This is often referred to as the Modified Claus Process.

They are paper strip to test SO2

Answer 3

To test for H2S, you can blow a sample of the gas through a container holding a metal (preferably reactive) such as silver or cadmium. If the silver tarnishes, then H2S is present. If the cadmium turns yellow, then CdS (cadmium sulfide, a pigment) would have formed and H2S is present.

For SO2, blow the gas through water with universal indicator. If the colour of the water turns from green to red, then it means that H2SO3 (an acid) has formed and that SO2 is in the gas mixture that you're trying to test.

Answer 4

Caution when working with H2S it is a deadly gas. Found in the west Texas oil fields we use gas detectors to warn of a hazard. The first alarm point is only 10 parts per million. The gas is so heavy that in a confined space such as a room when the 10 parts per million goes off it could be 300 on the floor,which is deadly.