Differentiation of Italian extra virgin olive oils by rapid evaporative ionization mass spectrometry

In Situ Quality Assessment of Dried Sea Cucumber (Stichopus japonicus) Oxidation Characteristics during Storage by iKnife Rapid Evaporative Ionization Mass Spectrometry

“…REIMS with a surgical electrosurgical diathermy hand-held device similar to a knife or probe induces the formation of an aerosol containing gaseous lipid ions by Joule heating-mediated cell lysis, occurrence of ionization, and formation of chemical fingerprints of the samples in MS in a few seconds. 21 Pattern recognition analysis has shown great advantages in signal analysis and massive data processing. Many types of pattern recognition analysis mainly including principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA) have been developed to analyze molecular profile information generated by REIMS.…”

“…Rapid evaporative ionization MS (REIMS) is a state-of-the-art ambient ionization MS technique, which yields highly specific lipid phenotypes of various biological tissue types and develops a sample-preparation-free, real-time, and lipidomics-based microbial identification system. REIMS with a surgical electrosurgical diathermy hand-held device similar to a knife or probe induces the formation of an aerosol containing gaseous lipid ions by Joule heating-mediated cell lysis, occurrence of ionization, and formation of chemical fingerprints of the samples in MS in a few seconds . Pattern recognition analysis has shown great advantages in signal analysis and massive data processing.…”

“…He et al used the iKnife–REIMS technique to differentiate fresh and frozen–thawed beef muscles based on multivariate statistical analysis . Mangraviti et al differentiated Italian extra-virgin olive oil by the combination of the well-established iKnife–REIMS method and pattern recognition analysis . Based on the outstanding performance, the iKnife–REIMS method is expected to real-time assess lipid oxidation characteristics in low-moisture foods during storage.…”

Rapid evaporative ionization mass spectrometry (REIMS) combined with chemometrics for real-time beer analysis

“…Approximately 30 mL of beer were placed in 50 mL aluminum cups and 1 mL of a solution of sodium chloride 1 mol L −1 was added to increase the electrical conductivity and signal intensity, providing a proper operation of the iKnife. 32 After salt dissolution, the samples were randomly analyzed by touching the iKnife device on the sample surface for approximately one second with a sampling frequency of 5 Hz. Spectral pre-processing was performed using the Progenesis Bridge® (Waters™ Corporation, USA), which performed the lock mass correction with [M − H] − = 554.2614 or [M + H] + = 556.2771 (leucine-enkephalin) for each ionization mode and background subtraction using standard software MassLynx® 4.2v (Waters™ Corporation, USA).…”

“…20 While most of the reports are related to meat products, the use of REIMS for other matrices is still incipient. For instance, REIMS was applied to determine the geographic origin and/or to certify the authenticity of pistachio, 23 olive oil, 31,32 krill phospholipids, 33 and honey. 34 However, applications using REIMS in food analyses are still scarce.…”