Nkbiotech one step organophosphorus pesticides test strip is a rapid test to qualitatively detect the presence of organophosphorus pesticides in specimens. The major advantages of the one step test strip are that results can be obtained within 10 min and that all reagents are included in the test device.It also relatively has many other advantages such as lower cost , fewer lable and berif sample preparation than the traditional test methods .This product can be used in testing the exist of pesticides in vegetables and fruit rapidly and conveniently outside in the opendoors ., it also possible to detect sulfamethazine below the maximum residue limit in muscle, tissue after a simple sample preparation.