Hach Chemistries That Cannot Be Used With The Pour-Thru Cell; Hach Chemistries That Require Extra Rinsing With The Pour-Thru Cell - Hach DR2400 Manual

Laboratory Practices
Laboratory Practices
Page 26
Table 6 Hach chemistries that cannot be used with the Pour-Thru cell
Aluminum ECR Arsenic
Cyanuric Acid Fluoride
Mercury Nickel, Heptoxime
Phenols Potassium
Suspended Solids Sulfate
Zinc Surfactants, Anionic (Detergents)
The Pour-Thru Cell can be used with the following Hach chemistries, but special
care must be taken to rinse the cell with deionized water between samples.
Table 7 Hach chemistries that require extra rinsing with the Pour-Thru cell
Aluminum, Aluminon
Copper, Porphyrin
Nickel, PAN
The Pour-Thru Cell can also be used to run Nitrogen, Ammonia, Nessler
Method, and TKN chemistries. Clean the cell by pouring a few sodium
thiosulfate pentahydrate crystals into the cell. Rinse out the crystals with
deionized water.
The Pour-Thru Cell cannot be used with 10-mL sample sizes and reagents. There
is not sufficient volume to flush the cell completely; this leads to sample
carryover errors. For some tests, you will find optional 25-mL reagents listed for
use with the Pour-Thru Cell.
Instead of placing a 25-mL sample cell into the cell holder, you simply pour the
solution into the funnel of the installed Pour-Thru Cell Assembly. Avoid spilling
solution onto the instrument.
The funnel height and orientation may be adjusted. The funnel height
determines the speed of sample flow through the cell. The higher the funnel, the
faster the flow. To minimize air bubbles, adjust the funnel so that it drains
completely with the final level of liquid in the tube about 5 cm (2 inches) below
the tip of the funnel.
Take instrument readings after the solution has stopped flowing through the
cell. Always rinse the cell thoroughly with deionized water after each series of
tests, or as often as specified in the procedure.
Occasionally, remove the Pour-Thru Cell to check for any accumulation of film
on the windows. If the windows appear hazy, soak the cell in a detergent bath
and rinse thoroughly with deionized water.
Note: The Cell cannot be used directly with Hach programs unless it is specified in the procedure.
Using the Pour-Thru Cell with other Hach procedures requires a standard adjust or entering
a dilution factor of 0.95. For more information, see Correcting for a Dilution Sample and
Running a Standard Adjust in the DR/2400 Spectrophotometer Instrument Manual.
Barium
Formaldehyde
Nitrite, HR
Selenium
TPH
Chlorine Dioxide, LR
Hardness, Calmagite
Nitrate, MR
Boron, Carmine
Lead, LeadTrak
PCB
Silver
Volatile Acids
Cobalt, PAN
Manganese, LR, PAN
Nitrate, HR
5940022LabPrac.fm