Re: What test reagents to replace from last years K2006 kit?
See Recognizing a Compromised Reagent from the Taylor website. I list below the chemicals found in various kits, grouped roughly by shelf life based on their content.
Indicator Dyes and FAS-DPD
(most sensitive; replace at least every 2 years if kept in cool dark place; if not cool, replace every year)- R-0004/R-0014 Phenol red pH indicator dye
also contains a mix of proprietary chlorine neutralizers (not thiosulfate)
- R-0600 Orthotolidine (OTO), chlorine indicator dye
- R-0870 N, N-diethyl-p-phenylenediamine (DPD)
powdered indicator dye plus phosphate buffer, EDTA and organic acid
- R-0871 Ferrous ammonium sulfate (FAS), titrant reagent
- R-0008 Bromocresol green and Methyl red, Total Alkalinity (TA) indicator combination dye
- R-0011L 1 - (Calcon indicator), Calcium Hardness (CH) indicator dye
Indeterminate shelf-life play it safe and replace every 2 years- R-0003 Potassium iodide
used for combined chlorine (CC) test or total chlorine (TC) tests - sunlight plus oxygen oxidizes it
- R-0007 Sodium thiosulfate, chlorine neutralizer
- R-0012 Ethylenediaminetetraacetic acid (EDTA), Calcium Hardness (CH) titrating reagent -- published shelf-life 18-48 months
- R-0013 Melamine, Cyanuric Acid (CYA) reagent
Acids/Bases
(least sensitive; essentially no degradation)- R-0005 Hydrochloric acid, acid demand reagent
- R-0006 Sodium hydroxide, base demand reagent
- R-0009 Sulfuric acid, for TA titration
- R-0010 Sodium hydroxide, Calcium Hardness (CH) buffer
Last edited by PoolDoc; 05-26-2018 at 02:58 PM.
Reason: edited formatting
15.5'x32' rectangle 16K gal IG concrete pool; 12.5% chlorinating liquid by hand; Jandy CL340 cartridge filter; Pentair Intelliflo VF pump; 8hrs; Taylor K-2006 and TFTestkits TF-100; utility water; summer: automatic; winter: automatic; ; PF:7.5
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