Patent ID: 8496880

Claim:
A test strip construction especially adapted for detecting low levels of a substance in a fluid test sample into which the construction is immersed and then removed for visual analysis thereof, comprising: a test strip comprising an adsorbent material having a non-separable testing region therein bearing a reagent for the detection of the substance in the fluid test sample; an elongated supporting member attached to said test strip only at a point substantially at a first end of the test strip, a remainder portion of the test strip being free of the supporting member, the testing region being located on the remainder portion of the test strip; the supporting member having a first portion serving as a backing for the test strip and the testing region thereof when the testing region overlies the first portion for visual analysis of the testing region after immersion and removal from the fluid test sample and a second non-backing portion not backing the test strip and testing region adjacent the first portion serving as a handle for the construction.