ToF‐SIMS and XPS characterization of antimicrobial textiles for the food processing industry

Abstract

International audienceTextiles for the food processing industry are treated by a patented technology combining an ionic polymer (antimicrobial agent) and a precipitating agent to obtain an insoluble deposit expected to exhibit antimicrobial properties. ToF-SIMS and XPS are used in the understanding of the surface chemistry at various steps of treatments (cleaning step prior to surface modification, antimicrobial deposit, industrial ISO 15797 washing). ToF-SIMS and XPS analyses show that the signatures of the antimicrobial treatment are detected at the surface after treatment. After industrial ISO 15797 washings, the precipitating agent is rapidly removed (possibly replaced by washing agent components) while the antimicrobial agent (PHMB) is still detected but is significantly removed from the surface after five washings. ToF-SIMS and XPS data are compared to microbiological tests specifically intended in relation with food processing industry applications. After the antimicrobial treatment, the surface is biocide as well as after a single ISO 15797 washing, but after 5 washings, either the surface is slightly active (cotton-based textile) or not active any more (polyester-based textile). The XPS N atomic percentage variation is unable to explain this difference. Even though a slight difference is observed for the ToF-SIMS normalized intensity for m/z = 184.1561 (PHMB molecular peak) between C/P and P/C samples, it can hardly be concluded that this would be the only explanation for the difference in activity. ToF-SIMS indicates that cotton is the textile component still detected at the surface of the washed samples. This could play a role in the remaining efficiency of the antimicrobial treatment after industrial washin

Evaluation of Antimicrobial Activity of a Polyhexamethylene Biguanide‐coated Textile by Monitoring Both Bacterial Growth (Iso 20743/2005 Standard) and Viability (Live/Dead Baclight Kit)

“…Taken together, these results demonstrate that the antimicrobial activity of coated textiles can be ascribed to PHMB‐LS complexes presence. Conclusions from ToF‐SIMS and XPS analyses are consistent: detailed ToF‐SIMS data treatment has been provided in a separate contribution (Brunon et al . 2010).…”

“…contribution (Brunon et al 2010). Briefly, ToF-SIMS analysis of ECE household washed control cotton/polyester sample indicated that the surface was relatively clean even at the sensitivity level of the ToF-SIMS technique.…”

Advanced Mass Spectrometry

“…Effects of ripening degrees and fruit varieties [96] GC-APCI-QqTOF Validation of a qualitative screening method for pesticides in fruits and vegetables [48] UHPLC-QqTOF Metabolomic analysis of meju during fermentation [97] LC-TOF Determination of phenolic compounds of "Sikitita" olive leaves [98] MALDI-TOF Cocoa content influences chocolate molecular profile [99] PTR-TOF Characterization of food and tasters: the case study of coffee [100] PTR-TOF Isobaric compounds in food-flavor applications [101] LC-IT-TOF Profiling and identification of the metabolites of (+)-catechin [34] GC-APCI-TOF Quantitative characterization of important metabolites of avocado fruit [102] TOF-SIMS Characterization of antimicrobial textiles for the food processing industry [38] UHPLC-QqTOF Analyses of products of aflatoxin B1 after ozone treatment [103] GC-TOF Metabolomics for comparison of caffeinated and decaffeinated coffee [104] UHPLC-TOF Metabolite profiling of Brazilian Lippia species [105] Profiling MALDI-TOF Discrimination of freshwater fish species [106] MALDI-TOF Fingerprinting as a new tool for quality control and health risk assessment of virgin olive oil [107] LC-TOF-MS Activity guided isolation of isoflavones and metabolome profiling of Azorella madreporica Clos. from northern Chile [108] …”

“…PTR-TOF In vitro and in vivo flavor release in cereal bars with varying sugar composition [148] PTR-TOF Online monitoring of coffee roasting [149] PTR-TOF Monitoring the effect of high pressure and transglutaminase treatment of milk on the evolution of flavor compounds during lactic acid fermentation [54] PTR-TOF-MS Effect of the pig rearing system on the final volatile profile of Iberian dry-cured ham [55] GC × GC-TOF Sensomics analysis of key hazelnut odorants (Corylus avellana L. "Tonda Gentile") [150] GC × GC-TOF Capture and identification of the volatile components in crude and processed herbal medicines [151] GC × GC-TOF Analysis of roasted and unroasted Pistacia terebinthus volatiles [152] [38]. The TOF-MS suitability for food analysis has been widely demonstrated.…”

“…The basic principles of operation are shown in Figure 4. Today's TOF mass spectrometers offer excellent sensitivity and high mass range as well as high-speed analysis [34][35][36][37][38][39][40][41]. This has made TOF-MS an essential instrument for food analysis applications-typically with matrix-assisted laser desorption/ionization (MALDI) and ESI ionization-particularly with the development of high-resolution and hybrid instruments [quadrupole time-offlight (QqTOF), ion-trap time-of-flight (IT-TOF), and TOF-TOF configurations].…”