| 摘要 |
Disclosed herein is a cation exchange capacity titration unit comprising a titration cell having a closed bottom end in fluid communication with an open top end; a recirculation loop comprising a pump and a sensing unit, wherein the pump comprises a pump inlet in fluid communication with the bottom end of the titration cell, and a pump outlet in fluid communication with a sensing unit inlet, the sensing unit inlet being in fluid communication with a sensing unit outlet, wherein the sensing unit outlet is in fluid communication with the top end of the titration cell such that operation of the pump results in an analyte sample flowing from the bottom end through the pump, through the sensing unit, and back into the top end of the titration cell in a continuous loop. A method of determining the cation exchange capacity of a sample is also disclosed. |
| 主权项 |
1. A cation exchange capacity titration unit comprising:
a titration cell, a metering pump, and a computer control system;
the titration cell having a closed bottom end in fluid communication with an open top end;a recirculation loop capable of circulating a liquid analyte sample from the bottom end of the titration cell back into the top end of the titration cell,the recirculation loop comprising a pump and a sensing unit, wherein the pump comprises a pump inlet in fluid communication with the bottom end of the titration cell, and a pump outlet in fluid communication with a sensing unit inlet, the sensing unit inlet being in fluid communication with a sensing unit outlet, wherein the sensing unit outlet is in fluid communication with the top end of the titration cell; the sensing unit further comprising a sensing element capable of providing an electric signal proportional to a concentration of an analyte in the liquid analyte sample;the metering pump having an inlet in fluid communication with a titrant reservoir, and a dispending outlet in fluid communication with the top end of the titration cell, wherein the metering pump is capable of dispensing a known amount of a titrant from the titrant reservoir into the titration cell in response to an output from the computer control system;the computer control system comprising comprises a sensor input in electronic communication with the sensing unit a metering pump output in electronic communication with the metering pump, a central processor, a data storage system, and an operator interface, and a data manipulation system, wherein the computer control system is capable of transferring inputs and/or outputs to and from the computer control system to the sensing unit and/or the metering pump, and wherein the computer control system is capable of accepting input from and displaying information to an operations technician, to determine the cation exchange capacity of a sample; anda filter support located within the titration cell between the too end and the bottom end of the titration cell, the too end of the titration cell in fluid communication with the bottom end of the titration cell through the filter support the bottom end outlet located below the filter support. |
