The ammonia 0-100ppm test strip technically has two test pads put together. One pad absorbs the dissolved ammonia and converts it to a gas, which the second pad registers and then changes color when dipped [...]
If you are experiencing different results (taste of bitterness, then no taste at all) with the PTC paper, there might be a few explanations. Sensitivity to PTC is based on a genetic disposition, so it [...]
Iodine solutions prepared at the concentrations on the color chart should react with the paper. It is important to dip the strip the full 60 seconds. The reaction takes place very slowly. On the other [...]
Can the Quick Response QAC (QAC-400) test strips be used to test clean surfaces by first dipping the strip in distilled water, and then pressing on a dry, cleaned food contact surface to obtain a [...]
The Glucose test strips were originally developed to test for glucose levels in urine for educational purposes (not medical diagnosis). Other uses include osmosis experiments where a glucose/starch solution is used to demonstrate the concept [...]
The SDS for each taste test paper lists the ingredients. The concentration of ingredients is usually so small, it is less than what would be considered hazardous. Aside from these small quantities, the cellulose paper [...]
The Vitamin C test strip uses 2,6-dichlorphenolindophenol as a red-ox indicator. This indicator changes from blue to colorless as the amount of ascorbic acid (Vitamin C) increases. Unfortunately, this indicator also detects other acids by changing from [...]
The Lead Acetate paper detects the presence of sulfur. The strip works best when wet (when testing for sulfur gas - the gas absorbs into the wet paper) or dipped into a test solution. The [...]
The potassium iodide test papers use the potassium iodide starch reaction. The iodide is oxidized to iodine that then reacts with the starch to form the blue/purple color. The strips can be used directly in [...]
The pad for reading the results is the one at the bottom of the channel or well. When laid on a table with the “bump” facing up, it is the pad you can see. This [...]