LaMotte DC1600 Colorimeter - Manual (Page 11)

ALUMINUM
ERIOCHROME CYANINE R METHOD CODE 3641
QUANTITY CONTENTS CODE
5 g *Aluminum Inhibitor Reagent *7865-C
2 x 120 mL *Aluminum Buffer Reagent *7866-J
120 mL Aluminum Indicator Reagent 7867-J
15 mL Aluminum Complexing Reagent 7868-E
1 Spoon, 0.1 g, plastic 0699
2 Pipets, 1.0 mL, plastic 0354
*WARNING: Reagents marked with a * are considered hazardous substances. Material Safety Data Sheets (MSDS) are supplied for
these reagents. For your safety, read label and accompanying MSDS before using.
Aluminum is the third most common element in the earth’s crust, which accounts for its wide appearance in many water
supplies. Aluminum exists in water as soluble salts, colloidal compounds, and insoluble compounds. In wastewater that has
been treated by alum coagulation it will appear in one or more of the above forms. Properly treated drinking water should
have an aluminum concentration below 0.05 mg/L.
APPLICATION: Drinking, surface, and saline water; domestic and industrial wastewater.
RANGE: 0 – 0.30 ppm Aluminum
METHOD: Aluminum ions buffered to a pH of 6.0 react with Eriochrome Cyanine R dye to produce a
pink to red complex in proportion to the concentration.
SAMPLE HANDLING
& PRESERVATION: Collect sample in acid washed glass or plastic bottle. Analyze as soon as possible.
INTERFERENCES: Fluoride and polyphosphate will interfere. Interference from iron and manganese is eliminated
by the addition of an inhibitor.
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