Comparison of sample preparation methods for the ICP-AES determination of minor and major elements in clarified apple juices

Iva Juranović Cindrić, Michaela Zeiner, Michaela Kröppl, Gerhard Stingeder

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Inductively coupled plasma atomic emission spectrometry (ICP-AES) was used for the determination of minor and major elements present in apple juices. Prior to ICP-AES measurement, samples were diluted with nitric acid or digested in a microwave assisted digestion system. The differences in the measured element concentrations after application of different types of sample preparation procedures are discussed. The direct measurement compared to closed microwave dissolution was found to be the best sample preparation procedure. Prior to the measurements the ICP-AES method was validated and optimized for the determination of elements in apple juices. For diluted apple juice samples the lowest limits of detection (LOD) were obtained for Ba and Cd (<20μgL-1), moderate ones for Cu, Mn, Ni, Fe, Ag, Ca, Cr, Zn, Mg, and Sr (20-100μgL-1), and the highest LODs for K, Pb, Na, and Al (>110μgL-1). The results obtained for the repeatability (<0.9%), the intermediate precision (<4.5%), the day-to-day reproducibility (<5.2%), and the overall uncertainty of measurement (approx. 4-7%) for all elements analyzed demonstrated the good applicability of the proposed method. Differences in major element content in fresh and commercial apple juice are discussed.

Original languageEnglish
Pages (from-to)364-369
Number of pages6
JournalMicrochemical Journal
Volume99
Issue number2
DOIs
Publication statusPublished - Nov 2011

Keywords

  • Apple juice
  • ICP-AES
  • Microwave assisted digestion
  • Minor and major elements

Fingerprint Dive into the research topics of 'Comparison of sample preparation methods for the ICP-AES determination of minor and major elements in clarified apple juices'. Together they form a unique fingerprint.

Cite this