The NKBIOTECH One Step QNS Test device is a rapid test to qualitatively detect the presence of Enrofloxacin / Ciprofloxacin / Norfloxacin in specimens at the sensitivity of 0.3ppb. The major advantages of the one step test strip are that results can be obtained within 10-25 min and that all reagents are included in the test device. It also relatively has many other advantages such as lower cost ,less labor and brief sample preparation than the traditional test methords .