An extraction method and applications of
acetylcholinesterase relate to a method to extract
acetylcholinesterase from
carp and a method to detect the residue of organic phosphorous pesticides. The extraction method is that: the tissues of
carp are undergone homogenate by
phosphorous acid buffer solution in ice bath, and is froze and centrifuging, and then the
enzyme liquid is prepared. The detecting method is that:
acetylcholinesterase of
carp brain is used for an
enzyme source, 2, 6-dichloro
Indophenol Sodium salt is used for a color developing agent, qualitative
filter paper is used for a vector, and the
enzyme is immobilized by absorption. The detailed operation is that: a plastized hard piece of paper is stuck with small pieces of paper; one side of the hard paper is added with the color developing agent and acetylthiocholine
iodide, the other side acetylcholinesterase solution, and the hard paper is put into a frigirater to be froze and dried and can be fetched when needed; the eluant of organic phosphorous
pesticide is dripped on and fully wet two filter papers, and the two pieces of
filter paper are overlapped for minutes to observe if the color is changed; the color of the
filter paper changes from blue to colorless if organic
pesticide is not existed, otherwise the blue color does not fade or does not obviously fade, the higher the concentration is, the more obviously the color change is. The invention has the advantages of low cost, rapid detecting speed and high sensibility.