Patent ID: 7938030

Claim:
A centrifugal analytical device comprising a rotary base which includes: a liquid accommodating chamber for accommodating a quantity of a sample solution required for analyzing; a volume measuring chamber for retaining a specified quantity of a sample solution, connected to the liquid accommodating chamber by a connecting path, and located radially outside the liquid accommodating chamber; and an overflow chamber connected to the volume measuring chamber for accommodating a quantity of a sample solution exceeding the specified quantity, wherein the volume measuring chamber includes a radially inner wall surface and an outer wall surface located radially outside the inner wall, a sample solution flow-in port and an overflowing port separately located in the inner wall surface of the volume measuring chamber, the sample solution flow-in port for permitting a sample solution from the liquid accommodating chamber to flow via the connecting path, for passing sample solution exceeding in volume the specified quantity of the volume measuring chamber through the overflow port to the overflow chamber, the flow-in port of the overflow chamber is radially inward from the overflow port of the volume measuring chamber, and connected to the overflow port by a capillary flow path, and the inner wall of the volume measuring chamber decreases in radial distance from the rotational center of the rotary base from the sample solution flow-in port toward the overflowing port.