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Limit of Aluminum

Uses fluorescence spectroscopy after extraction with a chelating agent.

Step-by-Step Instructions

  1. Dissolve 20.0 g of Sodium Chloride in 100 mL of water and add pH 6.0 acetate buffer.

  2. Extract the solution three times with a 0.5% solution of 8-hydroxyquinoline in chloroform.

  3. Combine the extracts and measure the fluorescence (Excitation: 392 nm, Emission: 518 nm).

Acceptance Criteria

  • Fluorescence does not exceed that of the standard (NMT 0.2 ppm).

 

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