The test strips
There are three types of test strips:
The qualitative test-papers look like little sheets which
contain one reagent and maybe an another complementary one. These test-papers
can be diped into a sample and then by changing of the paper's colour
we will get information about the substance in question. Their sensitivity
is the same or smaller than the sensitivity of the quantitative test strips.
The test strips are actually paper bands that have
one or more small square sheets with reagent. As an attachment they have
a range of colours that shows the quantity of the analysed substance.
They can be evaluated visually or photometrically. The evaluation with
the photometer is more exactly.
What kind of substances
can be measured by test-papers and
test-lines?
The following pictures show the nitrate, nitrite, total
hardness and pH measuring with quantitative test strips:
