| 摘要 |
PURPOSE:To determine quantitatively the component for which an adequate coloring reagent is not available by using a column packed therein with a solid material in a flow injection mechanism. CONSTITUTION:A sample is circulated through a liquid feed tube 1, a pump 2, a six-way selector valve 3, a specified amt. measuring and dispensing pipe 4, and a liquid feed tube 5. On the other hand, a carrier liquid is discharged after it is passed through a liquid storage tank 6, a pump 7, the valve 3, a column 8 packed therein with a solid material soluble in a free nitric acid and insoluble in the carrier liquid and a detection part 9. When the valve 3 is changed over from this state, the sample circulates without passing the pipe 4 and the carrier flows to the column 8 and the part 9 through the pipe 4. The sample is pushed out by the carrier liquid and dissolves the solid material in the column 8. Since the dissolved material flows into the colorimetric cell in the part 9 and exhibits the absorption peak corresponding to the rate of dissolution, the same is compared with a calibration line and the quantative measurement is thus accomplished. |
