Methods for the isolation and identification of a toxicant in a sample are disclosed. The first drive bracket includes a bottom plate. The ball return mechanism includes a first return line including a net end and a terminal end. The toilet purging device includes a tightening cap that is thread-fastened to the top of the firing unit with a gas container therebetween and moves the gas container to be in close contact with the firing pin when turned, and a connector that is coupled to the lower end of the pipe body and inserted into a drain pipe of a toilet.