Clinical Applications of Infrared Spectroscopy.  Analysis of Renal Tract Calculi

Weissman, Milton; Klein, Bernard; Berkowitz, Judith.

doi:10.1021/ac60152a026

Cited by 39 publications

(9 citation statements)

References 16 publications

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“…The sharp band at 540 cm-' is attributed to the S-S stretching mode. The recorded infrared spectrum of the grown samples were in good agreement with the reported literature values [15]. The observed vibrational frequencies and their assignments are listed in Table I.…”

Section: Experiments and Observationssupporting

confidence: 88%

Crystallization of cystine

Girija

Kalkura

Ramasamy

1995

J Mater Sci: Mater Med

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Cystine is an amino acid, which is a constituent of the urinary stones. It also is deposited in eyes, thyroid glands, bone marrow and white blood corpuscles. Crystals of cystine have been grown by both solution and gel methods. Small bunched hexagonal crystals, along with many other morphological crystals of size 0.3 mm across, were obtained. The crystals were analysed by X-ray diffraction and IR analyses.

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Section: Experiments and Observationssupporting

confidence: 88%

Crystallization of cystine

Girija

Kalkura

Ramasamy

1995

J Mater Sci: Mater Med

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“…Most spectra stored in libraries were recorded from human kidney stones because of significant differences between the spectra of natural and synthetic compounds highlighted by several authors (27,29). Most spectra stored in libraries were recorded from human kidney stones because of significant differences between the spectra of natural and synthetic compounds highlighted by several authors (27,29).…”

Section: Discussionmentioning

confidence: 99%

Infrared Analysis of Urinary Stones: a Trial of Automated Identification

Estepa¹,

Levillain²,

Lacour³

et al. 1999

CCLM

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A Search algorithm included in the Opus software of Bruker (Germany) was evaluated for analysis of urinary stones. Three reference libraries containing respectively 85 (single components), 1,059 (binary mixtures) and 4,565 (ternary mixture) digitized spectra were created and used to identify unknown spectra (n=320), applying the automatic procedure. Identification of the major component was correct in 83% of cases but the percentage of identification significantly decreased for the second and the third components. In cases of identification of the two first components, quantitative assessment was correct within tolerance limits +/- 15%. The computer results are judged unsatisfactory with regard to pathology because computer-aided identification is not sufficiently sensitive and specific to differentiate species with similar spectral pattern, even for the identification of main component, and also to detect minor components. It can be of assistance to guide spectral analysis, but it cannot replace human identification.

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“…On the remaining powder of each sample, duplicate determinations of main constituents were performed for comparison first by infrared spectrophotometry [7,8] and subsequently by established chemical methods of analysis.…”

Section: Methods For Dtamentioning

confidence: 99%

Thermal analysis of renal stones

Afzal

Iqbal

Ahmad

1992

Journal of Thermal Analysis

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The chemical composition of 200 renal stones, collected from Taxila, Rawalpindi and Islamabad regions in Pakistan, was determined by thermogravimetric (TG) and differential thermal analysis (DTA) techniques. The thermal curves show weight losses at various temperatures indicating dehydration and decomposition phenomena of renal stones. Results were compared with qualitative data obtained by IR analysis which confirmed the chemical composition of various stones in the solid state. The thermal curves helped in the differentiation of various kinds of water held by stones and their chemical composition was obtained by weight loss during pyrolysis. It was found that 26.5% of the stones were pure whewellite, 3% weddellite, 13% uric acid anhydrous, 7.5% struvite, 2.5% ammonium acid urate, 0.5% cystine and 47% stones had mixed composition. In the mixed state the most frequent combinations were those of calcium oxalate with uric acid (14.5%) and with phosphates (27.5%).

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Clinical Applications of Infrared Spectroscopy. Analysis of Renal Tract Calculi

Cited by 39 publications

References 16 publications

Crystallization of cystine

Crystallization of cystine

Infrared Analysis of Urinary Stones: a Trial of Automated Identification

Thermal analysis of renal stones

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