The Estimation of Total Sulphur in Urine.
نویسنده
چکیده
The estimation of the total sulphur content of urine is an analytical problem presenting some peculiar features. The compounds existing in urine which carry unoxidized sulphur are so stable as to require very vigorous oxidizing agents to convert the sulphur into sulphuric acid, yet the subsequent precipitation of the sulphate must take place in the complete absence of oxidizing agents, as well as of numerous special salts which modify the precipitate. Another requirement in the process is that the oxidation takes place in the presence of some substance capable of forming a stable combination with the newly oxidized sulphur. In the older attempts to fulfill these conditions the urine was burned with an alkali in the presence of an oxidizing agent (nitrate), the latter being subsequently destroyed by repeated evaporation with hydrochloric acid. Folinl has called into question the accuracy of the older fusion methods and has proposed a substitute for these which is the method probably most commonly employed at the present time. Like the preceding method of Modrakowski,2 Folin’s process depends upon fusion of the urinary residue with sodium peroxide, and the subsequent destruction of this oxidizing agent through treatment with boiling water. The results obtainable by this method appear to be highly satisfactory, but the technique involved is so laborious and difficult as to make the use of the method, especially where numerous analyses are to be made, almost prohibitive. Schulz3 has recently proposed a rapid method for the determination of total sulphur in urine which is based upon oxida-
منابع مشابه
Note on Benedict’s Method for Determining Total Sulphur in Urine
There has been considerable discussion on the question of determining total sulphur in urine. Folinl has suggested the use of sodium peroxide as oxidizing agent in determining total urinary sulphur. Benedict,2 by the use of copper nitrate and potassium chlorate, obtains results comparable with those of the Folin method. Ritson3 by using barium peroxide, obtains somewhat higher values than are g...
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عنوان ژورنال:
- The Biochemical journal
دوره 16 1 شماره
صفحات -
تاریخ انتشار 2003