Hach DR2400 Manual page 321

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Table of Contents

Reagent Solution

Scope and Application:

* Adapted from Stookey, L.L., Anal. Chem., 42(7), 779 (1970)

Tips and Techniques

• 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

instrument manual for more information on Running a Reagent Blank.

• If preferred, 0.5 mL of FerroZine

• 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.

Hach Programs

Hach Programs

Select program

260 Iron, FerroZine

Iron_PP_Other_FEZ_Eng_Ody.fm

For water and wastewater

Iron Reagent Solution (Cat. No. 2301-53) can be used in place of the solution pillow.

Fill a clean, round

sample cell to the 25-mL

mark with sample.

Add the contents of

one FerroZine

Reagent Solution Pillow

to the sample cell (this is

the prepared sample).

Swirl to mix.

(0.009 to 1.400 mg/L)

Touch the timer icon.

A five-minute reaction

period will begin. A violet

color will develop if iron is