Hach DR2400 - Using the Wiretrol Pipet

TPH (Total Petroleum Hydrocarbons)
TPH (Total Petroleum Hydrocarbons)
TPHSoil_None_Other_IMM_Eng_Ody.fm Page 7 of 12
Using the Wiretrol
®
Pipet
The Wiretrol Pipet can accurately measure small quantities of liquids. It consists
of two parts: a Teflon
®
-tipped plunger and a calibrated capillary tube. Use Figure
1 to determine the quantity measured at each line on the capillary tube.
The plunger can be re-used; the capillary tubes must be discarded after one use.
Figure 1 Wiretrol Pipet
50 µL
40 µL
30 µL
20 µL
10 µL
1. Wet the orange
Teflon
®
tip of the Wiretrol
plunger in the sample,
and carefully insert it into
the end of the capillary
tube with the colored
band on it.
2. Push the tip to the
other end of the capillary
tube until it barely
extends beyond the end
of the capillary tube.
3. Submerge the
capillary tube below the
surface of the liquid to be
pipetted. Slowly and
smoothly draw the
Wiretrol plunger up until
the bottom of the plunger
tip reaches the
appropriate volume line.
Note: Touch the end of the
tube to the side of the vessel to
release drops on the capillary
tube tip.
4. To discharge the
pipet, place the tip of the
capillary tube below the
surface of the solution
and push the Wiretrol
plunger down in one
smooth motion. Change
capillary tubes for each
calibrator and sample.