Hach DR2400 - Page 321

DR/2400
Iron
Iron_PP_Other_FEZ_Eng_Ody.fm Page 1 of 4
• Digestion is required for total iron determination. See Section 4 on page 55 for the digestion procedure.
• Rinse glassware with a 1:1 hydrochloric acid solution. Rinse again with deionized water. These two steps will remove iron
deposits that can cause slightly high results.
• For more accurate results, determine a reagent blank value for each new lot of reagent. Follow the procedure using deionized
water in place of the sample. Subtract the reagent blank value from the final results or perform a reagent blank adjust. See the
instrument manual for more information on Running a Reagent Blank.
• If preferred, 0.5 mL of FerroZine
®
Iron Reagent Solution (Cat. No. 2301-53) can be used in place of the solution pillow.
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
• If the sample contains rust, see Interferences on page 2.
• Use clean clippers, free of rust, and wipe with a dry towel. Do not allow clippers to contact contents of the pillow.
• FerroZine Iron Reagent may crystallize or precipitate when exposed to cold temperatures during shipment. Reagent quality is not
affected. Place the reagent in warm water to redissolve.
Iron
Method 8147
FerroZine
®
Method*
* Adapted from Stookey, L.L., Anal. Chem., 42(7), 779 (1970)
FerroZine
®
Reagent Solution
(0.009 to 1.400 mg/L)
Scope and Application: For water and wastewater
1. Touch
Hach Programs.
Select program
260 Iron, FerroZine.
Touch
Start.
2. Fill a clean, round
sample cell to the 25-mL
mark with sample.
3. Add the contents of
one FerroZine
®
Iron
Reagent Solution Pillow
to the sample cell (this is
the prepared sample).
Swirl to mix.
4. Touch the timer icon.
Touch
OK.
A five-minute reaction
period will begin. A violet
color will develop if iron is
present.
Tips and Techniques
10 mL
20 mL
25 mL
Method 8147
Hach Programs
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL