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*Replace caps immediately after use to limit exposure to air and humidity | *Replace caps immediately after use to limit exposure to air and humidity | ||
*Avoid switching bottle caps | *Avoid switching bottle caps | ||
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| + | ==Recognizing Bad Reagents== | ||
| + | *R-0002 DPD #2 - should be colorless; as it goes bad it will change to pink then brown<ref>https://www.taylortechnologies.com/en/page/152/recognizing-a-compromised-reagent</ref> | ||
| + | *R-0003DPD #3 - should be colorless; as it degrades it will become yellow | ||
| + | *R-0004 pH Indicator - as it degrades it turned from red to yellow or purple | ||
| + | *R-0008 TA Indicator - should be dark green; begins to stain the milky bottle as it goes bad | ||
| + | R-0011L - CH Indicator - should be deep blue color; any otehr color indicates it is bad | ||
| + | R-0718 Silver Nitrate Indicator - should be colorless; no easy way to tell if bad and recommended to replace annually | ||
| + | T-0871/R0872 FAS DPD - Should be colorless; if bad will become increasingly yellow | ||
Revision as of 16:35, 25 October 2019
All water test reagents have a shelf life. Powders and crystals are very stable if kept dry. Acids last long. Storage conditions ae more important then date of manufacturer for reagents[1]. Taylor reagents are formulated to last at least one year.
Reagent Storage Conditions
- Store reagents at a consistent temperature between 36F-85F (2C-29C)
- Extreme fluctuations cause reagents to deteriorate
- Keep reagents out or prolonged direct sunlight
- Replace caps immediately after use to limit exposure to air and humidity
- Avoid switching bottle caps
Recognizing Bad Reagents
- R-0002 DPD #2 - should be colorless; as it goes bad it will change to pink then brown[2]
- R-0003DPD #3 - should be colorless; as it degrades it will become yellow
- R-0004 pH Indicator - as it degrades it turned from red to yellow or purple
- R-0008 TA Indicator - should be dark green; begins to stain the milky bottle as it goes bad
R-0011L - CH Indicator - should be deep blue color; any otehr color indicates it is bad R-0718 Silver Nitrate Indicator - should be colorless; no easy way to tell if bad and recommended to replace annually T-0871/R0872 FAS DPD - Should be colorless; if bad will become increasingly yellow
