Direct Sampling Device for Contamination-Free Transfer of Analyte

摘要

A device and method for contamination-free transfer of samples is described. The device comprises an elongated member having an internal cavity and pressure-sensitive region. The internal cavity is in communication with at least a first open end of the elongated member. The pressure-sensitive region is disposed at a first distance from the first open end thereby forming a sampling portion of the device. The portion between the pressure-sensitive region and the second end forms a handling portion of the device. The pressure-sensitive region provides a stress concentration that increases the sensitivity to pressure. The device is used by contacting a sample with the first open end thereby causing sample to be received into the internal cavity of the sampling portion. The device is then inserted into a receiving container for use in the desired chemical analysis instrument. Pressure is applied to the pressure-sensitive region against the upper edge or wall of the receiving container thereby causing the sampling portion to be separated from the handling portion. The sampling portion and associated sample is retained in the receiving container which is then placed in the desired chemical analysis instrument for content determination without removal of the sampling portion. The handling portion can then be discarded. Thus, the sample is contained within the device at all times during sample collection and analysis which eliminates the possibility of contamination of the instrument and surrounding surfaces.