- Special indicator dyes do not allow bleeding
- Get quick and accurate results
- Results in 3 to 5 seconds
- Dye is covalently bound to the reagent paper
- Can be used in weakly buffered/weakly colored solutions
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ColorpHast Test Strips (Box of 100)
|Price:||$16.57 - $87.86|
These ColorpHast pH Test Strips allows you to take accurate pH readings in seconds. These non-ble... See more product details
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Oh and note to others getting this - they sometimes put a massive label covering up a full side of the chart (which I thought was missing until I scraped off the packaging label to reveal the rest of the cart).
General Procedure for the use of colorpHast Test Strips: This procedure is also printed on the color
1. Remove the strip from the box.
2. Immerse the reaction zone of the strip into the solution for approximately 3-5 seconds or
until there is no further color change.**
3. Remove the strip from the solution, wiping the strip along the edge of the vessel to
remove excess liquid from the strip.
4. Compare the reaction zones to the color chart on the box holding the strip to the top of
the box with the reaction zones to the bottom of the box.
5. Record the results of the closest matching color to the strip.
** For weakly buffered solutions, an extended period of time may be necessary. In these cases, immerse strip until there is
no further color change (1-10 minutes). Because the indicator is covalently bound to the colorpHast® strip, the test strip may
be immersed in the solution for longer periods of time if necessary.
I tested the strips using vinegar and definitely got an acidic reaction. I was getting concerned because pretty much every time I tested my dogs urine I was getting the same reading. So far I think they're accurate and they surely are easy to use!
Granted the strips were 'slow' to give a reading but then all the readings were the same.
Now I purchased other strips which worked great. But I feel (after reading negative comments for various brands) that sometimes you do get a dud. Is it the company or do some batches not work? Im not sure. My suggestion is to get two different brands to see which is more accurate.
Most Recent Customer Reviews
I've used this brand before. When my original purchase was too old to function anymore, I bought a new PH tester through Amazon. The purportedly new product DID NOT WORK! Read morePublished 3 months ago by Amazon Customer
I used these in a science class with my students. They seem pretty accurate. I wish there were half increments (7.5, 11.5, etc. Read morePublished 13 months ago by iman21