Is ammonia tested with wet purple litmus paper or wet red litmus paper? Can you use wet PH test paper?

Is ammonia tested with wet purple litmus paper or wet red litmus paper? Can you use wet PH test paper?

The effect of red litmus test paper is most obvious
All three. pH paper is the most expensive.

The red litmus test paper and the purple litmus test solution and phenolphthalein test solution are so different

There are two kinds of litmus test paper: red litmus test paper and blue litmus test paper. Red is used to test alkaline substances, and blue is used to test acid substances. The alkaline solution turns the red test paper blue, and the acid solution turns the blue test paper red. The litmus test paper can test the acid-base property of gas.
Purple litmus test solution is used to help judge the acidity and alkalinity of the liquid. Drop in the purple litmus test solution. If the test solution is red, the liquid is acidic; if the test solution is blue, the liquid is alkaline.
Phenolphthalein does not change color with acid solution, does not change color with neutral solution and turns red with alkali solution.