| 摘要 |
PURPOSE:To provide a detecting method for the end point of reaction which determines the end point time of the reaction wherein the reaction time is relatively long quickly. CONSTITUTION:Standard liquid is dropped by a titrating pump 3 to the liquid to be measured which is drawn out by an automatic sampler 1 for moving the liquid to be measured up to a measuring position by the command from an operation control part 2 contg. a microcomputer. A sensor 4 that can detect the progression state of reaction is inserted into the liquid and the progression state of the reaction between the components to be inspected in the liquid to be measured and the standard liquid is measured at prescribed time intervals. The absolute value of the difference between the 1st measured value and the measured value after the prescribed measurement times is calculated. Said value and a preset reference value are compared, and when said value is smaller than said reference value, it is decided that the reaction ends. If said value is larger than said reference value, the comparison of the absolute value of the difference between the 1st measured value and the measured value of the (prescribed times +1)th time and the reference value is repeated and the point of the time when the absolute value of the difference between said two measured values attains a value lower than the reference value is detected as the end point of the reaction. |
