Behavioural analysis of a nonionic detergent in the kraft pulp washing process using cryo-time-of-flight secondary ion mass spectrometry and cryo-scanning electron microscopy

Various phenomena in living physiological systems are conducted on the hydrated conditions, and in many cases, they do not work in a dry state. Imaging mass spectrometry is one of the direct detection methods scanning the sample surface with some focused and pulsed energy and analysing the sputtered components. However, under the high vacuum conditions required for usual imaging mass spectrometry, the sample surface is rapidly dried. It is difficult for the target cell to survive, and the original situation are lost soon. Here, the combination of a freeze-fixation and a cryo sample stage is a promising method to do mass spectrometry while maintaining the original situation. By rapidly freezing the cells, the momentary situation as a living cell is fixed. The situation in a living cell can be captured as still images by cryo imaging mass spectrometry. This mini-review introduces the outline of imaging mass spectrometry especially for low molecular weight components and recent results for frozen-hydrated samples by cryo secondary ion mass spectrometry.

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Distribution of Zn and active ingredients in deep penetration treated wood samples as observed by time-of-flight secondary ion mass spectrometry

Aoki

Okada²,

Shigeyama³

et al. 2020

Mokuzai Hozon

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In the deep penetration treatment for wood preservation, the infiltration state of the active ingredient has been evaluated by using a dithizone-Zn color reaction by adding a Zn compound together with the active ingredient. However, it has not been clarified what kind of difference exists in the penetration and diffusion behavior of the active ingredient and Zn. In this study, in order to evaluate the penetration and diffusion behavior of both components in the deep infiltration treatment process, deep penetration treated Douglas fir (Pseudotsuga menziesii) kiln dried wood and Scots pine (Pinus sylvestris) laminated wood were analyzed by time-of-flight secondary ion mass spectrometry. The results showed that Zn was strongly detected in a few cells, while the active ingredient distributed more widely. Although both components to be treated at the same time should share the initial infiltration process, the microscopic infiltration and diffusion behavior in wood during the infiltration and drying process should be different, which causes a difference in the final distribution state. The active ingredient may distribute more uniformly over a wider region than the Zn compound.

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Behavioural analysis of a nonionic detergent in the kraft pulp washing process using cryo-time-of-flight secondary ion mass spectrometry and cryo-scanning electron microscopy

Cited by 3 publications

References 24 publications

Cryo-TOF-SIMS Visualization of Water-Soluble Compounds in Plants

Cryo-TOF-SIMS Visualization of Water-Soluble Compounds in Plants

Cryo secondary ion mass spectrometry for wood component visualization: a mini review

Distribution of Zn and active ingredients in deep penetration treated wood samples as observed by time-of-flight secondary ion mass spectrometry

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