Home - Product Center - Information Center - Technical Center - Contact Center - Newsroom - Site Map
FX-1000p Chlorine Analyzer
"Buffer System "
Foxcroft Equipment and Service Co., Inc.
2101 Creek Road
Glen Moore, PA 19343 USA
610-942-2888
FAX 610-942-2769
email sales@foxcroft.com
White Distilled Vinegar
Foxcroft was the first to use the process to use white distilled vinegar as a buffering agent. Foxcroft also discovered the power of white distilled vinegar as a strong cleaning agent; particularly is areas where the sample has a large amount of iron and manganese. White distilled vinegar also serves as a great degreaser for waste water applications. By using our chlorine analyzer you protect the environment from any harmful chemicals
You are not limited to a one gallon container of white distilled vinegar. Using a larger container can extend the days between refilling a container. For example, a 5 gallon container will last almost 23 days. If your application allows #13 tubing this time can be extended further.
Preparing the Buffer Solution
The FX-1000p Amperometric Chlorine Analyzer is designed to use only 5% distilled, food grade white vinegar as a buffering agent. Using any other buffering agent may void warranty. White distilled vinegar can be purchased throughout the U.S.A. in any local food store.
Free Chlorine Measurement
Use common 5% distilled, food grad white vinegar only. Once opened, vinegar can become contaminated with biological organisms, especially over time and when it is not kept cool. Protect the vinegar from all types of contamination by keeping it cool, approximately 50 degree F, and by ensuring the supplied cap remains on the bottle.
When the vinegar is depleted, do not add new vinegar to the existing bottle. Always discard the old bottle and simply replace it with a new bottle. this prevents biological organisms from contaminating the new vinegar.
Total Chlorine Measurement
When measuring residual total chlorine, mix potassium iodide (KI) crystals directly into a 5% distilled, food grade white vinegar bottle at the time of use. Mix only one batch of vinegar and potassium iodide at a time, never premix. Always us ACS reagent grade KI
Refer to the table below to find the range in which your typical total chlorine process value resides. Add the listed amount of crystals to one gallon of white distilled vinegar.
Thoroughly mix the crystals until they are completely dissolved in the vinegar.
Once the potassium iodide crystals are mixed with white distilled vinegar, the potassium iodide has a limited life of 7 days per gallon. If using #13 tubing it is recommended that an Auxiliary KI pump be installed. Mix the potassium iodide crystals with distilled water, rather than the vinegar. This will extend the limited life of the buffer solution, as it will be pumped separate from the vinegar.
| Range of Typical Value | Amount of (KI) Crystals |
| 0 to 0.5 ppm | 10 grams to one gallon |
| 0.5 to 1.0 ppm | 20 grams to one gallon |
| 1.0 to 2.0 ppm | 40 grams to one gallon |
| 2.0 to 5.0 ppm | 60 grams to one gallon |
| 5.0 to 20 ppm | 100 grams to one gallon |