A new approach for standard preparation in microbeam analysis: Development and validation

Homma-Takeda, Shino; Nishimura, Y.; Iso, Hiroyuki; Ishikawa, Takahiro; Imaseki, Hitoshi; Yukawa, Masae

doi:10.1007/s10967-008-7312-6

Cited by 19 publications

(15 citation statements)

References 6 publications

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“…were 20 Â 40 (B-E) steps at 100 lm/step (beam size, 100 lm Â 100 lm), 60 Â 60 (G and I) steps at 5 lm/step (beam size, 1 lm Â 1 lm) and 50 Â 50 (J and K) steps at 1 lm/ step (beam size, 1 lm Â 1 lm). Uranium concentration range of image was calculated using thin standards for microbeam analysis developed at our laboratory [16]. sites in the epithelium (Fig.…”

Section: Elemental Imaging Of the Kidneymentioning

confidence: 99%

Elemental imaging of kidneys of adult rats exposed to uranium acetate

Homma-Takeda¹,

Terada

Nakata³

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Elemental Imaging Of the Kidneymentioning

confidence: 99%

Elemental imaging of kidneys of adult rats exposed to uranium acetate

Homma-Takeda¹,

Terada

Nakata³

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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“…We recently developed a thin-section standard using polyvinyl alcohol 11 and confirmed that the standard is adequate for quantitative analysis within a spatial resolution of around 10 × 10 µm 2 . 12,13 In the present study, we attempted to perform a quantitative local analysis of Sr in a micro-region of the scale with the standard.…”

Section: Introductionmentioning

confidence: 90%

“…11 Briefly, the standard solution of Sr (10000 ppm, SPEX Certi Prep, NJ, USA) was stirred into the optimal cutting temperature (OCT) compound (Sakura Finetechnical Co., Ltd., Tokyo, Japan) and deaerated. The final levels of Sr in the mixed solutions were 0-500 µg/g.…”

Section: Preparation Of Sr Standardsmentioning

confidence: 99%

LOCAL ANALYSIS OF STRONTIUM USING FISH SCALE BY MICRO-PIXE WITH A CdTe X-RAY DETECTOR

Suzuki

Homma-Takeda²,

Oikawa³

et al. 2012

Int. J. PIXE

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Sr is an indicator used in studies on fish migration. In this study, the Sr profiles of ridges, which are growth lines in fish scales, in Sakhalin taimen (Hucho perryi) were examined by micro-PIXE analysis. Sakhalin taimen were reared under freshwater conditions for six months. The ridges that formed during the rearing experiment were subjected to PIXE spot analysis. This analysis was performed in a 5 × 5 µm 2 area in the center region of each ridge of the scale section, and the Sr levels were calculated using the thin-section standard. The mean Sr concentration in the ridges was 428 ± 48 µg/g. The quantitative PIXE spot analysis successfully provided Sr profiles for the scale corresponding to ridge formation.

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“…The obtained elemental maps were colored from deep blue to red, and classified into 256 from the lower detection limit up to the maximum concentration in linear proportion to the element concentration. The uranium concentration range in the images was calculated using thin uranium standards for microbeam analysis (10 mm; 0-500 mg g À1 ) developed in our laboratory (Homma-Takeda et al, 2009a). The standards were analyzed under the same conditions as the samples.…”

Section: Msr-xrf Analysismentioning

confidence: 99%

Uranium XAFS analysis of kidney from rats exposed to uranium

et al. 2017

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The kidney is the critical target of uranium exposure because uranium accumulates in the proximal tubules and causes tubular damage, but the chemical nature of uranium in kidney, such as its chemical status in the toxic target site, is poorly understood. Micro-X-ray absorption fine-structure (mXAFS) analysis was used to examine renal thin sections of rats exposed to uranyl acetate. The U L III -edge X-ray absorption near-edge structure spectra of bulk renal specimens obtained at various toxicological phases were similar to that of uranyl acetate: their edge position did not shift compared with that of uranyl acetate (17.175 keV) although the peak widths for some kidney specimens were slightly narrowed. mXAFS measurements of spots of concentrated uranium in the micro-regions of the proximal tubules showed that the edge jump slightly shifted to lower energy. The results suggest that most uranium accumulated in kidney was uranium (VI) but a portion might have been biotransformed in rats exposed to uranyl acetate.

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A new approach for standard preparation in microbeam analysis: Development and validation

Cited by 19 publications

References 6 publications

Elemental imaging of kidneys of adult rats exposed to uranium acetate

Elemental imaging of kidneys of adult rats exposed to uranium acetate

LOCAL ANALYSIS OF STRONTIUM USING FISH SCALE BY MICRO-PIXE WITH A CdTe X-RAY DETECTOR

Uranium XAFS analysis of kidney from rats exposed to uranium

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