YSI pHotoFlex Series - Manual (Page 5)

pHotoFlex
®
Series Practical part
5 ba76126e01 03/2013
1 Practical part
1.1 For your safety
When developing test sets YSI carefully sees that the tests can be car-
ried out as safely as possible. Some hazards by dangerous substanc-
es, however, cannot always be avoided.
Caution
Improper handling of certain reagents can cause damage to your
health.
In any case follow the safety labels on the packing and the safety
instructions of the package insert.
Protective measures specified there have to be followed exactly.
Qualification of the user We assume that, due to their professional training and experience, the
users are able to correctly understand the safety labels and safety in-
structions and to appropriately follow the protective measures specified
there.
1.2 General information on test sets
Test sets contain special reagents that are added to the test sample ac-
cording to a certain specification (analysis specification). These re-
agents react with the test sample. After the reaction the prepared
product is inserted in the cell shaft of the photometer in a cell and the
photometric measurement is carried out.
In addition to the reagents in the test set, further common laboratory
auxiliary reagents can be required such as acids or lyes to adjust a cer-
tain pH value.
Categories The test sets can be divided into two categories depending on the way
they are carried out:
 Reaction cell tests
They provide highest convenience. All the special reagents required
are prepared in a measuring cell. Normally, a certain quantity of
sample has just to be added (with some reaction cell tests, a dose
of reagent as well).
 Reagent tests
They contain all reagents required for measurement. Mostly, the
sample and reagents can be prepared directly in the cell. An empty
cell is required to carry out a reagent test (diameter, see analysis
specification).