Integrated water testing system and method for ultra-low total chlorine detection

摘要

A system and method for determining a concentration of total chlorine in dialysis water are provided. The system comprises a main unit housing an iodide/water sample chamber and a reducing agent chamber. An electrode pair bridges the two chambers and generates tri-iodide proportional to the amount of total chlorine in the dialysis water. The electrode pair detects the amount of tri-iodide generated in proportion to the amount of active chloride in the dialysis water. The system is suitable for use in connection with, or for incorporation into, a water purification system for generating dialysis fluid, and may include a display that alerts the user to stop or prevent a hemodialysis treatment if the total chlorine level exceeds a predetermined level.

主权项

1. A system for determining a level of total chlorine in a dialysis water sample, the system comprising:
a water purification machine; a dialysis machine in fluid communication with the water purification machine; and a total chlorine detector in fluid communication with the water purification machine, said total chlorine detector including:
an iodide reservoir configured to store iodide fluid,a reducing agent reservoir configured to store a reducing agent,a first chamber in fluid communication with the iodide reservoir and a water sample produced by the water purification machine,a second chamber in fluid communication with the reducing agent reservoir, wherein the first and second chambers are separated by a membrane that allows an electrical charge but not fluid to pass between the chambers,an electrode pair associated with a voltage source, wherein one electrode of the electrode pair is in contact with an interior of the first chamber and the other electrode of the electrode pair is in contact with an interior of the second chamber, anda control unit connected operably to the electrode pair, the control unit configured to (i) at one time cause the voltage source to apply a source voltage to the electrode pair and (ii) at a second time stop applying the source voltage to the electrode pair and instead monitor a sensed electrical parameter through or across the electrode pair.