Total chlorine water detection system and method for medical fluid treatments

A method of determining an amount of total chlorine in an at least partially purified water sample associated with renal failure therapy comprising:

• (a) providing a water purification machine;
• (b) providing a dialysis machine, said dialysis machine receiving purified water from the water purification machine;
• and
• (c) providing a total chlorine detection system in fluid communication with the water purification machine and the dialysis machine, wherein the total chloride detection system includes:
• (i) a first electrode pair configured to generate tri-iodide in the presence of iodide and a total chlorine compound upon application of a first voltage, and
• (ii) a second electrode pair in fluid communication with the first electrode pair, the second electrode pair configured to determine a current associated with the tri-iodide generated by the first electrode pair upon application of a second voltage to the second electrode pair;
• (d) providing an at least partially purified water sample, the at least partially purified water sample including an amount of total chlorine;
• (e) monitoring a background current via a tri-iodide detection circuitry, the background current associated with an amount of tri-iodide in the system before introduction of the at least partially purified water sample;
• (f) metering an amount of the at least partially purified water sample into the total chlorine detection system;
• (g) monitoring a baseline current via a tri-iodide detection circuitry, the baseline current associated with the amount of total chlorine in the at least partially purified water sample;
• (h) generating a first amount of tri-iodide from the at least partially purified water sample by application of a first voltage to the first electrode pair;
• (i) monitoring a first current by application of a second voltage to the second electrode pair, the first current associated with a sum of the amount of total chlorine and the first amount of tri-iodide;
• (j) generating a second amount of tri-iodide from the at least partially purified water sample by application of a third voltage to the first electrode pair;
• (k) monitoring a second current by application of a fourth voltage to the second electrode pair, the second current associated with a sum of the amount of total chlorine and the first and second amounts of tri-iodide;
• (l) optionally generating a third amount of tri-iodide from the at least partially purified water sample by application of a fifth voltage to the first electrode pair;
• (m) optionally monitoring a third current by application of a sixth voltage to the second electrode pair, the third current associated with a sum of the amount of total chlorine and the first, second and optional third amounts of tri-iodide;
• and
• (n) calculating the total chlorine concentration in the at least partially purified water sample using the background current, the baseline current, and at least two of the first current, the second current, and the optional third current.

A method of determining an amount of total chlorine in an at least partially purified water sample associated with renal failure therapy comprising:

• (a) providing an at least partially purified water sample from a water purification machine, said water purification machine in fluid communication with a dialysis machine;
• (b) monitoring a background current associated with tri-iodide present before introduction of the at least partially purified water sample;
• (c) monitoring a baseline current associated with total chlorine present in the at least partially purified water sample;
• (d) generating a first amount of tri-iodide from the at least partially purified water sample by application of a first voltage to the at least partially purified water sample;
• (e) monitoring a first current associated with the amount of total chlorine and the first amount of tri-iodide;
• (f) generating a second amount of tri-iodide from the at least partially purified water sample;
• (g) monitoring a second current associated with the amount of total chlorine and the first and second amounts of tri-iodide;
• (h) optionally generating a third amount of tri-iodide from the at least partially purified water sample;
• (i) optionally monitoring a third current associated with the amount of total chlorine and the first, second and optional third amounts of tri-iodide;
• and
• (j) calculating the amount of total chlorine in the at least partially purified water sample using the baseline current, optionally the background current, and at least two of the first current, the second current, and the optional third current.