A blood measuring apparatus includes: a liquid supply source storing a sheath liquid and applying a pressure to supply the sheath liquid to first and second chambers, pressures of the sheath liquids to be supplied to the first and second chambers different from each other; a sheath flow generator sending a blood sample supplied to the first chamber, to the aperture while causing the blood sample to be converged by a sheath flow due to the sheath liquid supplied from the liquid supply source; and a swirling flow generator causing the blood sample in the second chamber, to be converged by a swirling flow due to the sheath liquid supplied from the liquid supply source, thereby allowing the blood sample to flow in a direction separating from the aperture.

According to one embodiment, a method for detecting a sample includes preparing a device for detecting a sample, the device including a measurement cassette, a first chamber formed by partitioning the cassette with a partition wall, a through-hole provided in the partition wall, a first electrode provided in the cassette, and a second electrode provided in the cassette, introducing a reagent and a sample containing a measuring object substance into the first chamber, introducing a conductive liquid into the second chamber, supplying current to the through-hole, allowing the measuring object substance whose surface is bound to and is covered by the tag particles via the capture substance in the first chamber to pass through the through-hole, and detecting presence of the measuring object substance.

Provided are a device and a method for rapidly and simply detecting endotoxin without using an expensive reagent. The endotoxin detection device includes: a region containing an electrolyte solution; a partitioning member that partitions the region into two compartments such that the two compartments are in communication via a nanopore; a first electrode that is disposed in a first compartment; a second electrode that is disposed in a second compartment and is electrically connected to the first electrode; an electrolyte solution flow generating means that causes electrolyte solution in the first compartment to move to the second compartment via the nanopore; an application means that applies voltage between the first electrode and the second electrode; and a monitoring means that monitors current.

Provided are a device and a method for rapidly and simply detecting endotoxin without using an expensive reagent. The endotoxin detection device includes: a region containing an electrolyte solution; a partitioning member that partitions the region into two compartments such that the two compartments are in communication via a nanopore; a first electrode that is disposed in a first compartment; a second electrode that is disposed in a second compartment and is electrically connected to the first electrode; an electrolyte solution flow generating means that causes electrolyte solution in the first compartment to move to the second compartment via the nanopore; an application means that applies voltage between the first electrode and the second electrode; and a monitoring means that monitors current.

A method is provided for storing a particle analyzer capable of suppressing deterioration of a measurement performance with the lapse of time in a particle analyzer for analyzing particles such as exosomes, pollen, viruses, and bacteria. The particle analyzer has a first storage chamber in which a first liquid is stored, a second storage chamber in which a second liquid containing particles to be analyzed is stored, and a flow path connecting the first storage chamber in fluid communication with the second storage chamber. According to the method, at least a portion of the first storage chamber, the second storage chamber, and the flow path are surface-treated, which includes filling an internal space defined by the first storage chamber, the second storage chamber, and the flow path with a liquid to thereby store the particle analyzer in a state that the surface-treated portion is not in contact with air.