Hach DR/850 - Page 200

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Summary of Method
FerroVer Iron Reagent reacts with all soluble iron and most
insoluble forms of iron in the sample to produce soluble ferrous
iron. This reacts with 1,10-phenanthroline indicator in the reagent
to form an orange color in proportion to the iron concentration.
REQUIRED REAGENTS & APPARATUS (Using Powder Pillows)
Quantity Required
Description Per Test Unit Cat No.
FerroVer Iron Reagent Powder Pillows ...................1 pillow ............... 100/pkg..........21057-69
Sample cell, 10-20-25 mL, with screw cap .................. 1.........................6/pkg..........24019-06
REQUIRED REAGENTS & APPARATUS (Using AccuVac Ampuls)
FerroVer Iron Reagent AccuVac Ampuls ................1 ampul ................. 25/pkg..........25070-25
Beaker, 50 mL............................................................... 1...........................each...........500-41H
OPTIONAL REAGENTS
Description Unit Cat. No.
Ammonium Hydroxide, ACS................................................................500 mL..............106-49
Drinking Water Standard, Metals, LR (Cu, Fe, Mn) .............................500 mL..........28337-49
Drinking Water Standard, Metals, HR (Cu, Fe, Mn).............................500 mL..........28336-49
Hydrochloric Acid Standard Solution, 6 N............................................500 mL..............884-49
Hydrochloric Acid, ACS........................................................................500 mL..............134-49
Iron Standard Solution, 100 mg/L .........................................................100 mL..........14175-42
Iron Ampule Standard, 50 mg/L ............................................................20/pkg..........14254-20
Nitric Acid, ACS....................................................................................500 mL..............152-49
Nitric Acid Solution, 1:1........................................................................500 mL............2540-49
RoVer Rust Remover ................................................................................ 454 g..............300-01
Sodium Hydroxide Standard Solution, 5.0 N .............................100 mL MDB............2450-32
Water, deionized............................................................................................4 L..............272-56
Turbidity 1. Add 0.1 g scoop of RoVer Rust Remover to the blank
in Step 3. Swirl to mix.
2. Zero the instrument with this blank.
3. If sample remains turbid, add three 0.2 g scoops of
RoVer to a 75-mL sample. Let stand
5 minutes.
4. Filter through a glass filter or centrifuge.
5. Use filtered sample in Steps 3 and 6.
Sample pH (extreme) Adjust pH to 3-5. See Interferences in Section 1.
Highly Buffered Samples Adjust pH to 3-5. See Interferences in Section 1.
Interfering Substance Interference Level and Treatment
IRON, TOTAL, continued