Determination of Iron Content in Foods by

Vis Colorimetry

 

INTRODUCTION:

 

Iron in HCl solutions has the ability to form a deep Red-Orange color when combined with the Thio-Cyanate anion (KSCN).

 

PURPOSE:

 

To determine the concentration (amount) of Iron extracted from various Foods (cookies, cereals, candies, grains, etc); using Known Concentrations of Iron Thiocyanate complexes.

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INSTRUMENTS NEEDED:

 

· EDU-6320D-SPEC VIS Colorimeter OR EDU-6305-SPEC_ Scanning UV-Vis Spectrophotometer   INFO/Buy IT!

 

· 10mm. square Cuvettes (Poly-Styrene or PMP / disposable-reusable) OR Glass or Quartz Cuvettes

 

 

 

SUPPLIES:

 

  1. Vials of Standard IRON solutions @ 1.0, 2.5, 5.0, 10.0 and
  1. 25.0PPM (made from 1000PPM Stock)Text Box: FUN-SCI Kit Includes all supplies INFO/Buy IT!
  2. De-Ionized Water (for "BLANK" / Zero readings) and rinsing the
  3. Cuvettes
  4. 0.1M Potassium Thiocyanate Reagent
  5. 0.5N Hydrochloric Acid

SAMPLES:

 

·   Disgusting healthy Breakfast Cereals: like TOTAL, SMART START and SPECIAL-K;

·   and some tasty, no-good Kids Cereals: like CAPTAIN CRUNCH and LUCKY CHARMS

 

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