23
The 1-inch and 1-cm Pour-Thru Cells have slightly different optical
properties and purge volumes as shown in the following table.
The 10-mL procedures cannot be used with the 1-inch Pour-Thru Cell as
10 mL is not enough to completely flush out the previous sample.
Procedures with 10 mL as the final volume include optional 25-mL
reagents so the Pour-Thru Cell may be used when feasible.
2.5 Sample Cell Adapter Installation
The light path is from right to left as you view from the front of the
instrument. When placing one of the adapters into the cell holder, line the
light path ports in the adapters facing right and left. All of the adapters
can be rotated 180 degrees with no affect on the optics. For a list of the
available adapters, refer to REPLACEMENT PARTS.
2.5.1 Using the AccuVac Vial Adapter
Hach Company's AccuVac Ampul reagents can be used in the DR/2010
Spectrophotometer with the aid of the adapter provided in the accessories.
Test procedures for AccuVac reagents are included in the procedure
manual and in the method list on the underside of the cell compartment
cover (AV denotes an AccuVac procedure). If using the instrument in
direct sunlight, use the light shield cap to cover the cell holder.
Reagents are contained in sealed, evacuated vials and are mixed with the
water sample by partially immersing the ampul and breaking off the tip to
allow sample to be drawn in. Reacted sample is measured in the ampul
once the adapter is installed in the instrument. For proper orientation of
the adapter in the sample cell compartment, place the grip tab of the
adapter toward the back of the compartment (see Figure 4, Installing
AccuVac Vial Adapter).
Table 1 Pour-Thru Cell Differences
Cell Minimum Purge Volume
1cm 20 mL to keep the Abs reproducibility within ±0.002 Abs when
increasing the sample concentration from 0.000 to 1.600 Abs or
decreasing the sample concentration from 1.600 to 0.000 Abs.
(at 548 nm)
1inch 22 mL to keep the Abs reproducibility within ±0.002 Abs when
increasing the sample concentration from 0.000 to 2.000 Abs or
decreasing the sample concentration from 2.000 to 0.000 Abs.
(at 548 nm)
To Next Page
Loading...
