Practical Hints On the Analysis of Water And Sewage for the Use of Medical Offi
Practical Hints On the Analysis of Water And Sewage for the Use of Medical Offi
Sidney Barwise
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16, c) may be poured in. If tube 2 shows a trace of ammonia, the blank tube must be allowed to collect about 50 c. C. More ; that is, to be half filled, and to this 2 c. C. Of Xessler's test are to be added. If the test shows that ammonia is still being given off, this must be poured into the 500 c. C. Flask, and more collected, until all the ammonia has come off. As soon as no colour is given with the Nessler test, 50 c. C. Of the alkaline permanganate are to be measured in the clean measuring... glass (sec. 11), and poured gently through the thistle funnel into the distillation flask, tube No. 3 having been previously placed under the condenser to collect the organic ammonia. As soon as tube 3 is full, tube 4 is to be brought under, and as soon as this is half full it is to be Nesslerized. If it contain no ammonia, as shown by there being no colour on the addition of the Nessler's test, the gas may be turned off, as the process is complete ; if it does contain ammonia, more distillate is to be collected in the spare tube, the contents of which, if they contain any free ammonia, are to be first transferred to the 500 c.
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