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> 80 ph 1-14 universal full range test paper *uk stock*
80 ph 1-14 universal full range test paper *uk stock*
4 books of 20 strips = total 80 strips
Sent by UK Royal Mail (2-3 days - 2nd class)
The pH paper are all freshly stocked from the manufacturer, they are all sealed and have never been handled no contamination.
The pH papers are manufactured to high standard, meeting the standards of Q/GHSC1544 for analytical laboratory works.
The pH paper comes with a standard colour chart with a colour band for each of the 14 pH units. This allows you to test your samples accurately.
If you are dissatisfied with this product and it was due to a quality problem of this product, we will offer 100% full refund on your purchase. So far, we sold thousands of pH papers but have never had any issue with their quality.
For each item you will receive one pack of 80 strips of pH paper in a sealed packing. A manufacturer s standard colour chart is supplied with every pack.
You can divide the test strips with scissors for more tests to be performed.
Instructions are supplied with every order.
Technical support is offered through email.
Now being offered here at an everyday low price of 1.00 per pack
What is pH paper how does it work? do they have a limitation?
pH paper or universal indicator paper is a pure cellulose paper that was treated with universal indicator solution, which is a mixture of pH sensitive dyes. It is then dried and cut into strips in a quality-controlled factory.
When a solution containing acids/bases is applied to a pH paper, the acid/bases reacts with the pH-sensitive dyes on the strip. The structural change of these dye molecules causes a change in their absorbance wavelengths which is observed as a change in colour.
Also the sample must be dissolved in water or moistened with pure water. Weak samples such as tap water, aquarium water, etc. may not respond to this test paper.
Please bear-in-mind this physical limitation of pH paper when making your purchase. If you need greater sensitivity, you will need to use a pH electrode meter that measures the electrode potential (a physical method) instead of relying on a chemical method (pH paper).
pH paper will be useful in chemical laboratories, industrial factories, science classrooms or at home or for personal use.
A popular use of these pH papers is that you can do science experiments with your children showing them colourful chemistry using food and household chemicals many household chemicals have different pHs, I can provide a list of suitable materials to be used in the experiment upon request.
I should add that these pH papers are non-hazardous, the amount of chemical dye they contain is tiny. Caution that the dyes leached from it may stain skin and clothings.
I am very happy to discuss any questions just leave me a message.
KKJ Chan No parts of this product description and the display photograph may be copied or used for commercial purposes without obtaining permission. All rights reserved.
Test pH more precisely? Be confident to 0.3 - 0.5 pH units:
Universal pH paper (Full range paper) allows a general testing of pH, giving you an indication of the pH of the sample.
You can be confident usually to within +/- 1 pH unit. This can be a limit to your research requiremnt.
Narrow range pH test papers, are designed for an accurate pH testing to 0.2 - 0.5 pH units (depending on the range).
These paper can be used in conjunction with the universal full range paper to give you confident results:
(eg. If a test with full range paper shows the pH is roughly 7 to 8, testing with a narrow range paper for the range 5.5-9.0 can pin-point the value at 7.5)
