Cited by 26Food and Agricultural SciencesAnalytical Chemistry and ChromatographyAnalytical Methods in Pharmaceuticals

Application of UHPLC for the determination of free amino acids in different cheese varieties

Mayer, Helmut K., Fiechter, Gregor·2013·Analytical and Bioanalytical Chemistry

Abstract

A rapid ultra-high performance liquid chromatography (UHPLC) protocol for the determination of amino acids as their respective 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) derivatives was successfully applied for assessing free amino acid levels in commercial cheese samples representing typical product groups (ripening protocols) in cheesemaking. Based on the Waters AccQ.Tag™ method as a high performance liquid chromatography (HPLC) amino acid solution designed for hydrolyzate analyses, method adaptation onto UHPLC was performed, and detection of AQC derivatives was changed from former fluorescence (λ(Ex) 250 nm/λ(Em) 395 nm) to UV (254 nm). Compared to the original HPLC method, UHPLC proved to be superior by facilitating excellent separations of 18 amino acids within 12 min only, thus demonstrating significantly shortened runtimes (>35 min for HPLC) while retaining the original separation chemistry and amino acid elution pattern. Free amino acid levels of the analyzed cheese samples showed a high extent of variability depending on the cheese type, with highest total amounts found for original Italian extra-hard cheeses (up to 9,000 mg/100 g) and lowest for surface mold- or bacterial smear-ripened soft cheeses (200-600 mg/100 g). Despite the intrinsic variability in both total and specific concentrations, the established UHPLC method enabled reliable and interference-free amino acid profiling throughout all cheese types, thus demonstrating a valuable tool to generate high quality data for the characterization of cheese ripening.

Integrity signals

Registry

Crossref · 10.1007/s00216-013-6974-2

Cites

28 of 28 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Mayer, H. K., & Fiechter, G.
Affiliations
BOKU University (AT)
Corresponding author
Mayer, Helmut K.
Venue
Analytical and Bioanalytical Chemistry
Published
2013-04-25
Volume
405
Issue
25
Pages
8053-8061
ISSN
  • 1618-2642 (ISSN-L)
  • 1618-2650
OpenAlex
W2051451783
Cited by
26
References
28
Citations by year
2025: 3 · 2024: 2 · 2022: 6 · 2021: 6 · 2020: 1 · 2019: 1 · 2018: 2 · 2016: 2 · 2015: 3
FWCI
2.49
Type
journal article
Language
en
Open access
closed
Locations
  • Analytical and Bioanalytical Chemistry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
  • Physical Sciences › Chemistry › Spectroscopy › Analytical Chemistry and Chromatography
  • Physical Sciences › Chemistry › Analytical Chemistry › Analytical Methods in Pharmaceuticals
Keywords
free amino acids, cheese, UPLC, cheese ripening, cheese varieties, UV detection, method adaptation, amino acid profiling, cheese quality
MeSH terms
Amino Acids, Aminoquinolines, Carbamates, Cheese, Chromatography, High Pressure Liquid, Food Analysis

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review