Surface chemistry of vessel elements by FE-SEM, μ-XPS and ToF-SIMS

Holzforschung ◽  
2011 ◽  
Vol 65 (5) ◽  
Author(s):  
Elina Orblin ◽  
Valerie Eta ◽  
Pedro Fardim
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Raw Materials ◽  
Lower Surface ◽  
Vessel Element ◽  
X Ray ◽  
Recycled Pulp ◽  
Tof Sims ◽  
Vessel Elements ◽  
Printing Ink ◽  
Secondary Ion

Abstract Separation of vessel elements and fibers was carried out for Eucalyptus kraft and recycled pulp as raw materials. A new separation method is presented. The surface morphology, surface chemical characteristics and chemistry of individual vessel elements were studied using field emission scanning electron microscopy (FE-SEM), microbeam X-ray photo-electron spectroscopy (μ-XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). By FE-SEM it could be seen that vessel elements in recycled pulp were almost intact or only partly broken via the pits. They were also detected on the surface of newsprint paper. The chemical composition of vessel element surfaces was similar to that of fibers. The surface coverage by lignin in vessels showed scattered results by μ-XPS. However, normalized lignin peak intensities of ToF-SIMS indicated that vessels had lower surface lignin counts than fibers. Vessel elements in recycled pulp were rich in phthalates and other hydrocarbons originating probably from printing ink and paper chemicals. Fillers, sizes, and other paper chemicals were not completely removed from the recycled vessel surfaces during the de-inking.

scholarly journals Iodine Content and Distribution in Thyroid Specimens from Two Patients with Graves' Disease Pretreated with Either Propylthiouracil or Stable Iodine: Analysis Using X-Ray Fluorescence and Time-of-Flight Secondary Ion Mass Spectrometry

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Marie Hansson ◽  
Helena Filipsson Nyström ◽  
Svante Jansson ◽  
Jukka Lausmaa ◽  
Gertrud Berg
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Time Of Flight ◽  
Iodine Content ◽  
Graves Disease ◽  
X Ray ◽  
Tof Sims ◽  
Ion Mass Spectrometry ◽  
Secondary Ion ◽  
Stable Iodine

Patients with Graves' disease can be medically prepared before surgery in different ways, which may have various effects on iodine stores. Thyroid specimens were collected at surgery from two patients pretreated with propylthiouracil (PTU) and stable iodine, respectively. A quantitative analysis of iodine content was performed using X-ray fluorescence (XRF) in frozen tissue and a qualitative analysis of aldehyde-fixed material with Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS). Iodine concentrations were 0.9 mg/mL and 0.5 mg/mL in the thyroid tissue from the patients treated with PTU and stable iodine respectively. TOF-SIMS showed iodine in the follicle lumina in both. However, in the PTU case, iodine was also seen within the thyrocytes indicating accumulation of iodinated compounds from uninhibited hormone release. XRF and TOF-SIMS can be used to follow iodine distribution within the thyroid and the intricate processes following the different medical treatment alternatives in Graves' disease.

scholarly journals ToF-SIMS imaging reveals that p-hydroxybenzoate groups specifically decorate the lignin of fibres in the xylem of poplar and willow

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Robyn E. Goacher ◽  
Yaseen Mottiar ◽  
Shawn D. Mansfield
Keyword(s):  
Cross Sections ◽  
Cell Walls ◽  
Tension Wood ◽  
Secondary Ion Mass Spectrometry ◽  
Cell Types ◽  
Structural Elements ◽  
Tof Sims ◽  
Vessel Elements ◽  
The Family ◽  
Secondary Ion

AbstractEsterified phenolics occur as γ-linked lignin acylations in many plant taxa but little is known about the distribution or function of such groups. In the family Salicaceae, p-hydroxybenzoate groups are present in the lignin of poplars (Populus spp.) and willows (Salix spp.). In this study, the distribution of cell wall-bound p-hydroxybenzoate was examined in different tissue and cell types of poplar and willow trees. This analysis showed that p-hydroxybenzoate groups were most prevalent in juvenile stems, and were elevated in tension wood and following nitrogen fertilisation. Closer examination of stem cross-sections using time-of-flight secondary-ion mass spectrometry (ToF-SIMS) directly showed that p-hydroxybenzoate groups occur predominantly in the cell walls of fibres and are largely absent from vessel elements. These results point to a role for ester-linked groups in modifying the syringyl-rich lignin of fibres, perhaps to strengthen the cell walls of these structural elements or to increase lignification rates.

Characterization of hydrogenated graphite powder by X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 80649-80654 ◽  
Author(s):  
Wenjing Xie ◽  
Kai Mo Ng ◽  
Lu-Tao Weng ◽  
Chi-Ming Chan
Keyword(s):  
Mass Spectrometry ◽  
Photoelectron Spectroscopy ◽  
Secondary Ion Mass Spectrometry ◽  
Time Of Flight ◽  
Graphite Powder ◽  
X Ray ◽  
Tof Sims ◽  
Ion Mass Spectrometry ◽  
Secondary Ion

Hydrogenated graphite powder was obtained through Birch reduction of graphite powder and characterized by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) at 500 °C.

scholarly journals Characterization and Structure–Property Relationships of Organic–Inorganic Hybrid Composites Based on Aluminum–Magnesium Hydroxycarbonate and Azo Chromophore

Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 880 ◽  
Author(s):  
Anna Marzec ◽  
Bolesław Szadkowski ◽  
Jacek Rogowski ◽  
Waldemar Maniukiewicz ◽  
Marian Zaborski
Keyword(s):  
Mass Spectrometry ◽  
Azo Dye ◽  
Secondary Ion Mass Spectrometry ◽  
Hybrid Composites ◽  
Structure Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tof Sims ◽  
Ion Mass Spectrometry ◽  
Secondary Ion

In this study, novel organic–inorganic composites were prepared by the complexation of dicarboxylic azo dye (AD) with aluminum–magnesium hydroxycarbonate (AlMg–LH). This procedure provides an effective method for the stabilization of dicarboxylic organic chromophores on an AlMg−LH host. The structures of the hybrid composites were examined by X-ray diffraction (XRD), secondary ion mass spectrometry (TOF-SIMS), 27-Al solid-state nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA) and scanning transmission electron microscopy (STEM). The TOF-SIMS method was applied to investigate the metal–dye interactions and to monitor the thermal stability of the organic–inorganic complexes. Secondary ion mass spectrometry confirmed the presence of a characteristic peak for C18H10O5N2Mg22+, indicating that both carboxylic groups interacted with AlMg−LH by forming complexes with two Mg2+ ions. Modification with hybrid pigments affected the crystal structure of the AlMg−LH mineral, as shown by the appearance of new peaks on the X-ray diffraction patterns. Adsorption of the dicarboxylic chromophore not only led to significantly enhanced solvent resistance but also improved the thermal and photostability of the hybrid pigments. We propose a possible arrangement of the azo dye in the inorganic matrix, as well as the presumed mechanism of stabilization.

scholarly journals Which fraction of stone wool fibre surface remains uncoated by binder? A detailed analysis by time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 39545-39552
Author(s):  
Sabine Hirth ◽  
Hubert Waindok ◽  
Wendel Wohlleben
Keyword(s):  
Photoelectron Spectroscopy ◽  
Secondary Ion Mass Spectrometry ◽  
Fibre Surface ◽  
Wool Fibre ◽  
X Ray ◽  
Lung Fluid ◽  
Tof Sims ◽  
Stone Wool ◽  
Secondary Ion ◽  
Simulated Lung Fluid

ToF-SIMS mapping reveals that man-made vitreous fibres (MMVF) are fully covered with binder explaining variations in biodurability testing with simulated lung fluid described earlier.

scholarly journals Application of the TOF-SIMS and SEM-EDS methods to assess the influence of dusting from a phosphate waste deposal place based on hair analysis

2007 ◽  
Vol 9 (4) ◽  
pp. 85-90 ◽  
Author(s):  
Małgorzata Szynkowska ◽  
Ewa Leśniewska ◽  
Aleksandra Pawlaczyk ◽  
Jacek Rogowski ◽  
Tadeusz Paryjczak
Keyword(s):  
Electron Microscopy ◽  
Mass Spectrometry ◽  
Scanning Electron Microscopy ◽  
Secondary Ion Mass Spectrometry ◽  
Hair Analysis ◽  
X Ray ◽  
Tof Sims ◽  
Secondary Ion ◽  
Hair Surface ◽  
Scanning Electron

Application of the TOF-SIMS and SEM-EDS methods to assess the influence of dusting from a phosphate waste deposal place based on hair analysis In this work, scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) and the time-of-flight secondary ion mass spectrometry (TOF-SIMS) were used to study the particles present on the hair surface of the inhabitants of Wislinka (people environmentally exposed due to the closeness of a dump) in order to obtain the information about the possible influence of dusting from a phosphate waste deposal place. Additionally, the morphology and the composition of fresh phosphogypsum were analyzed. Waste phosphogypsum is formed in the process of a wet phosphoric acid production and there is still a problem with its storage. A thorough understanding of the composition and chemistry of phosphogypsum seems to be necessary to evaluate its environmental impact comprehensively. The results obtained from these two techniques turned out to be complementary and revealed the information expected.

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