| 摘要 |
PURPOSE:To enable highly accurate and stable analysis to be performed by specifying the position of injecting the sample regulating liquid and by washing a sample liquid intake port at the time of calibration. CONSTITUTION:To the liquid, which has been taken from the sample liquid intake port 1 and has passed a fixed delivery pump 2, a specified amount of the sample regulating liquid is added from a fixed delivery pump 4 for the sample regulating liquid. The regulation is performed so that pH of sample liquid is 4 or less without change in the absolute amount of oil. The sample liquid wherein the oil extracting efficiency is improved is analyzed highly accurately by a liquid analyzer 3 such as an oil content meter. In the meantime, during the period the analysis is not performed, zero calibrating liquid which also serves as washing liquid is supplied to the port between the analyzer 3 and the intake port 1 by a washing liquid injecting pump 5. Thus the zero calibration of the analyzer 3 and washing of a filter and the like of the intake port 1 are performed. Therefore the next analysis can be performed excellently and stably. |
