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The Thermogravimetric Analysis of Renal Stones (in clinical practice)
Author(s) -
ROSE G. ALAN,
WOODFINE C.
Publication year - 1976
Publication title -
british journal of urology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.773
H-Index - 148
eISSN - 1464-410X
pISSN - 0007-1331
DOI - 10.1111/j.1464-410x.1976.tb06668.x
Subject(s) - thermogravimetric analysis , calcium oxalate , oxalate , quantitative analysis (chemistry) , clinical practice , chemistry , medicine , chromatography , inorganic chemistry , organic chemistry , family medicine
Summary Thermogravimetric (TG) analysis has been used as a routine technique for renal tract stone analysis. The results obtained in a consecutive series of 502 renal stones are described and evaluated. The technique is easy, rapid and gives quantitative information about stone composition. Results were compared with quantitative data obtained by standard chemical methods. Correlation coefficients for oxalate and urate were 0.947 and 0.97 respectively. The comparison also showed that 63% of the stones could have been correctly analysed by TG analysis alone; in an additional 31%, TG analysis provided helpful information. TG analysis permits the identification of the proportions of mono‐ and dihydrate of oxalate present in calcium oxalate. It is confirmed that the centres of calcium oxalate calculi are richer in dihydrate than the exterior surfaces. We are grateful to the British Postgraduate Medical Federation for having financed the purchase of the Stanton‐Redcroft thermogravimetric equipment.