In one embodiment, the invention is to a sample metering device, comprising a sample holding chamber oriented between a sample entry port and a sample extraction unit, wherein a portion of said extraction unit defines a metered volume of a sample. A diluent may be transported over and/or through the extraction unit to form a diluted sample for sample analysis. In another embodiment, the invention is to an apparatus and method for rapid determination of analytes in liquid samples by various assays including immunoassays incorporating a sample dilution feature, capable of being used in the point-of-care diagnostic field is provided. The devices and methods of the invention preferably are well-suited for high range sample dilution.

The present invention may provide a cover for a specimen storage container, the cover comprising: a cover body comprising a tubular side portion and a bottom portion coupled to one end of the side portion, the cover body being detachably screwed to one open side of the specimen storage container into which at least one specimen collection swab is inserted; an insertion coupling part protruding from the bottom portion toward the specimen storage container, and having an internal space formed therein, stick parts of the at least one specimen collection swab being inserted and fitted into the internal space; and a separation prevention part provided in the insertion coupling part so as to engage with/contact the stick parts when the cover body is coupled to the specimen storage container, thereby preventing the stick parts from being separated from the insertion coupling part.

Systems, and methods that facilitate the performance of an assay of a sample substantially in real-time. Thus, the assay can be performed, and the desired result obtained, much more quickly than allowed by conventional systems and methods.

A system and method for sampling metal ions in a corrosive gas is provided. The system includes: a sampling bottle; a vacuuming pipeline provided with a vacuuming device, where the vacuuming device is configured to vacuum a sampling chamber; a replacement gas pipeline configured to blow a replacement gas into the sampling chamber; an injection pipeline configured to inject a sample gas into the sampling chamber; and a purge gas pipeline. With the sampling system, the sampling bottle can be first subjected to vacuuming and thorough replacement to reduce the interference of impurities, then the sampling bottle is introduced with a corrosive sample gas, and then a corrosive gas is vaporized and blown away through a purge gas to leave metal ions or metal ions are dissolved in an absorption solution.

A system and method for sampling metal ions in a corrosive gas is provided. The system includes: a sampling bottle; a vacuuming pipeline provided with a vacuuming device, where the vacuuming device is configured to vacuum a sampling chamber; a replacement gas pipeline configured to blow a replacement gas into the sampling chamber; an injection pipeline configured to inject a sample gas into the sampling chamber; and a purge gas pipeline. With the sampling system, the sampling bottle can be first subjected to vacuuming and thorough replacement to reduce the interference of impurities, then the sampling bottle is introduced with a corrosive sample gas, and then a corrosive gas is vaporized and blown away through a purge gas to leave metal ions or metal ions are dissolved in an absorption solution.