Abstract: It is an object to provide an apparatus adaptable to an apparatus for analyzing liquid samples in the chemical field or the biochemical field, and capable of performing pretreatment, such as washing of the needle and diluting of the collected sample.

Abstract: It is an object to provide an apparatus adaptable to an apparatus for analyzing liquid samples in the chemical field or the biochemical field, and capable of performing pretreatment, such as washing of the needle and diluting of the collected sample.

Abstract: An optical absorbance meter has a flow passage for liquid to be tested, each end of which is closed with a flat light-transmission plate, an introducing path for introducing liquid to the flow passage and a discharging path for discharging the liquid from the flow passage wherein light from a light source is incident from one side near the flat light-transmission plate and emits from the other side near the flat light-transmission plate, wherein a first optical aperture is disposed in front of the flat light-transmission plate at an incident side; a second optical aperture is disposed in rear of the flat light-transmission plate at an emission side; the aperture diameter of the first optical aperture in the direction perpendicular to the axial line of the flow passage is equal to or smaller than the smallest diameter of the flow passage in the direction perpendicular to the axial line of the flow passage, and the aperture diameter of the second optical aperture in the direction perpendicular to the axial line

Abstract: A thermal cycling reaction apparatus comprises a reactor having a reactor body made of a thin heat-conductive plate having a cavity as a reaction chamber with an opening of the chamber sealed with a transparent heat-resistant sheet. The apparatus further includes, delivery rollers for delivering the reactor along a delivery path and stopping it at stopping positions in a predetermined order; plural temperature-controlling blocks having respectively a temperature-controlling surface to be brought into contact with a heat-transfer face of the reactor and being placed at the stopping positions separately so as not to thermally affect each other; and a temperature-controlling mechanism for keeping the fixed temperature-controlling surfaces respectively at prescribed temperatures.