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3. Stir the solution until the reagent fully dissolves.
4. Let the solution temperature decrease to approximately 25 °C.
5. Dilute to the mark with deionized water. Mix fully.
6. Add the solution to the analyzer bottle. Insert the seal assembly and put the cap on.
Prepare Reagent 2
Use standard laboratory protocols during preparation.
Items to collect:
• Oxalic acid dihydrate, (COOH)
·2 H
O, > 99.5%, analytical quality, 80 g
2
2
• Sodium dodecyl sulfate, CH
(CH
)
SO
Na, 10 g
3
2
11
4
• Volumetric flask, 2 L
• Laboratory funnel
• Deionized water, 2 L
• Analyzer Bottle #R2
1. Add approximately half of the deionized water to the volumetric flask.
2. Weigh 80 g of oxalic acid dihydrate. Add the oxalic acid dihydrate to the flask. Mix fully.
3. Weigh 10 g of sodium dodecyl sulfate. Add the sodium dodecyl sulfate to the flask.
4. Stir the solution until the reagent fully dissolves.
5. Dilute to the mark with deionized water. Mix fully.
6. Add the solution to the analyzer bottle. Insert the seal assembly and put the cap on.
Prepare Reagent 3
Use standard laboratory protocols during preparation.
Items to collect:
• Concentrated sulfuric acid, H
SO
, 95–97%, analytical quality, 25 mL
2
4
• Ferrous ammonium sulfate hexahydrate, (NH
)
Fe(SO
)
·6H
O, >99%, analytical quality, 120 g
4
2
4
2
2
• Graduated cylinder, 25 mL
• Volumetric flask, 2 L
• Laboratory funnel
• Deionized water, 2 L
• Analyzer Bottle #R3
1. Add approximately half of the deionized water to the volumetric flask.
2. Measure 25 mL of sulfuric acid.
3. Stir the water and slowly add the sulfuric acid. The solution becomes warm.
4. Weigh 120 g of ferrous ammonium sulfate hexahydrate. Add the ferrous ammonium sulfate
hexahydrate to the flask. Mix fully. Let the solution temperature decrease to approximately 25 °C.
5. Dilute to the mark with deionized water. Mix fully.
6. Add the solution to the analyzer bottle. Insert the seal assembly and put the cap on.
Prepare Reagent 4
Use standard laboratory protocols during preparation.
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