YSI pHotoFlex Series - Manual (Page 34)

34 ba76126e01 03/2013
Note: Before using the test with your photometer for the first time, determine the reagent blank
value.
YSI model no.: DEHA-1 TP
Category: RT (reagent test)
Cell: 28 mm
Measuring range: 0.004 - 0.450 mg/l DEHA
Display in mmol/l possible
Pipette 25.0 ml of
sample into an empty
beaker. Add the contents of a
Vario Oxyscav 1 RGT
powder packet and
dissolve it by stirring. Add 0.5 ml Vario DEHA
2 RGT with a pipette and
mix. Fill an empty cell with the
prepared sample, close it
with the screw cap and
put it in a dark place. Allow the sample to react
for ten minutes in a dark
place. Then measure
immediately.
Insert the cell in the
photometer cell shaft
and start measurement.
Notes:
• We recommend to determine a new reagent blank value (deionized water instead of sample) for each test package started.
• Clean all laboratory glassware with hydrochloric acid (approx. 20 %), then thoroughly rinse with deionized water.
• Avoid excessive movements and exposure to sun light during sampling. Store the samples hermetically sealed.
• The temperature of the samples must be 25±3 °C.
10:00
DEHA vario
Program no.
335
*RN335*