Finšgar Matjaž, Ristić Tijana, Fardim Pedro, Zemljič Lidija Fras
University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova ulica 17, 2000, Maribor, Slovenia.
Health Care Department, Tosama d.o.o., Production of Medical Supplies, Vir, Šaranovičeva cesta 35, 1230, Domžale, Slovenia.
Anal Biochem. 2018 Sep 15;557:131-141. doi: 10.1016/j.ab.2018.07.021. Epub 2018 Jul 24.
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was employed to analyse cellulose viscose fibres treated with different chitosan-based solutions. The analysis reports several new features in the TOF-SIMS spectra for systems with various forms of chitosan-treated surfaces. The characteristic positive ion TOF-SIMS signals for chitosan are reported at m/z 147.90, 207.07, and 221.09, and characteristic signals for trimethyl chitosan are present at m/z 58.03 and 102.09. Furthermore, new fragments were suggested to characterise acetylated chitosan molecules. The relative surface concentrations of different species were obtained based on the specific signal ratios (originating from a specific fragment and cellulose). SIMS imaging was then performed in order to investigate the surface distribution of chitosan, trimethyl chitosan, and Na-containing nanoparticles. In order to perform TOF-SIMS imaging, the above-mentioned characteristic signals were employed and m/z 22.99 was used for Na nanoparticles.
采用飞行时间二次离子质谱（ToF-SIMS）对用不同壳聚糖基溶液处理过的粘胶纤维进行分析。分析报告了壳聚糖处理表面的不同形式系统在ToF-SIMS光谱中的几个新特征。壳聚糖的特征正离子ToF-SIMS信号出现在m/z 147.90、207.07和221.09处，三甲基壳聚糖的特征信号出现在m/z 58.03和102.09处。此外，还提出了用于表征乙酰化壳聚糖分子的新碎片。基于特定信号比（源自特定碎片和纤维素）获得了不同物种的相对表面浓度。然后进行SIMS成像，以研究壳聚糖、三甲基壳聚糖和含钠纳米颗粒的表面分布。为了进行ToF-SIMS成像，使用了上述特征信号，m/z 22.99用于钠纳米颗粒。
