Aluminum
 
 
Instrumental Kits
Range Method Kit Catalog No.
0.04-0.25 ppm Eriochrome Cyanine R (ECR) K-0603

Method

References: APHA Standard Methods, 21st ed., Method 3500-AI B (2005). Rapid Modified Eriochrome Cyanine R (ECR) Method for Determination of Aluminum in Water, Kenneth E. Shull and Gene R. Guthan, pp 1456-1468, J. AWWA, Nov. 1967.


Aluminum forms a variety of minerals in the earth's crust. Aluminum and its alloys have many uses: heat exchangers, construction materials, and aircraft parts. Alum (aluminum potassium sulfate) is used in water treatment to flocculate suspended particles but may raise the level of aluminum in finished drinking water. The maximum secondary contaminant limit for drinking water is 0.05-0.2 mg/L.

 

The Aluminum Vacu-vials® test method is based on the reaction between aluminum and Eriochrome Cyanine R (ECR), which forms a red dye-lake at approximately pH 6.0 in proportion to the amount of aluminum present in the sample. Results are expressed as ppm (mg/L) aluminum.