Instrumental Analysis of Foods: Inductively Coupled Plasma Mass Spectrometry for Determination of Metals in Cereals and Fast Ion Chromatography Analysis for Minerals in Sport Drinks

Ronald Bartzatt *

Department of Chemistry, University of Nebraska, Durham Science Center, Omaha, NE 68182, USA

Conrad Martinez

Department of Chemistry, University of Nebraska, Omaha, NE 68182, USA

*Author to whom correspondence should be addressed.


Abstract

Aims: Foods are analyzed for their content for important reasons that include: Adherence to government regulations, nutritional labeling, authentication, inspection (for grading), safety, quality control and detection of adulterants.

Study Design: Inductively coupled plasma mass spectrometry (ICP-MS) analysis of various commercial cereals was accomplished. Commercial drinks were analyzed by ion chromatography instruments.  

Place and Duration of Study: The investigation was carried out at the University of Nebraska, Omaha Nebraska from January 2014 to May 2014.

Methodology: Cereals were treated in strong acid to extract heavy metals. Following dilution steps, these extracts were injected into ICP-MS for analysis. Quantity of metals as well as isotope distribution was established. Commercial sports drinks were examined for clarification and injected into ion chromatography instruments for analysis for calcium, sodium, potassium, magnesium, chloride, phosphate, sulphate and fluoride. 

Results: (ICP-MS) analysis of various commercial cereals showed a content of chromium, nickel, copper, zinc and traces of lead. In general, zinc was found to be highest in content within the cereal products analyzed ranging from 2.951mg/kilogram to 90.56mg/kilogram (mean = 58.38mg/kilogram), followed by copper ranging from 1.218mg/kilogram to 4.395mg/kilogram (mean = 2.756mg/kilogram). This is followed in amounts (by average of all samples tested) by nickel, lead and chromium. Chromium, copper, nickel and zinc are considered human micronutrients. Sport drinks are consumed for their mineral content and enhancement of electrolytes. Various sports drinks analyzed showed both cation and anion minerals in their content, which included: sodium, potassium, calcium, magnesium, sulfate, phosphate, chloride, fluoride and nitrate ions. 

Conclusion: ICP-MS and ion chromatography are versatile approaches for analysis of food nutrient value and metals content. ICP-MS can track the absorption of heavy metals into commercial cereals. Ion chromatography can identify adulterants in sport drinks.

 

Keywords: ICP-MS, cereals, mass spectrometry, food analysis, sports drinks


How to Cite

Bartzatt, Ronald, and Conrad Martinez. 2014. “Instrumental Analysis of Foods: Inductively Coupled Plasma Mass Spectrometry for Determination of Metals in Cereals and Fast Ion Chromatography Analysis for Minerals in Sport Drinks”. Advances in Research 3 (4):357-65. https://doi.org/10.9734/AIR/2015/13579.

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