User Guide

49
Chromium VI LR
• Remove the cuvet and add the
content of one packet of HI
93749 reagent. Replace the
cap and shake vigorously for
about 10 seconds.
• Reinsert the cuvet into the instrument.
• Press TIMER and the display will show the countdown prior to the
measurement or, alternatively, wait for 6 minutes and press READ
DIRECT. In both cases "SIP" will blink during measurement.
• The instrument directly displays concentration in µg/L of Chro-
mium VI on the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by:
Vanadium above 1 ppm. However, waiting 10 minutes before
reading, the interference is removed
Iron above 1 ppm
Mercurous and mercuric ions cause slight inhibition of the reaction.