India Rubber Laboratory Practice
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In our eReader you can find the full English version of the book. Read India Rubber Laboratory Practice Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book India Rubber Laboratory Practice
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1257.
vni ANALYSIS OF MANUFACTURED RUBBER 147 sterilized with alcohol, serves as external indicator, giving a yellow coloration when the end-point is reached.
When the hydrogen sulphide precipitate consists of antimony sulphide, the metal is best determined gravi- metrically as on p. 76. Lead and antimony are seldom, if ever, present together. In rubber compounded with black reclaims, however, a little antimony may occur side by side with lead and may be detected by extracting the mixed sulphid...es with sodium sulphide solution.
Vermilion is recognizable in rubber goods by its brilliant reds and pinks free from the slightest yellow or brown tone. In its presence, nitric acid must be added when the charge is decomposed by hydrochloric acid, otherwise it will not dissolve completely. All the mercury is then brought down by hydrogen sulphide. Mercury and antimony sometimes occur together, in which case the sulphides are separated by means of sodium sul- phide.
3. The filtrate from the foregoing is boiled until free from hydrogen sulphide, filtered if necessary, and rendered alkaline with ammonia.
What to read after India Rubber Laboratory Practice?
You can find similar books in the "Read Also" column, or choose other free books by William Augustus Caspari to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1257.
vni ANALYSIS OF MANUFACTURED RUBBER 147 sterilized with alcohol, serves as external indicator, giving a yellow coloration when the end-point is reached.
When the hydrogen sulphide precipitate consists of antimony sulphide, the metal is best determined gravi- metrically as on p. 76. Lead and antimony are seldom, if ever, present together. In rubber compounded with black reclaims, however, a little antimony may occur side by side with lead and may be detected by extracting the mixed sulphid...es with sodium sulphide solution.
Vermilion is recognizable in rubber goods by its brilliant reds and pinks free from the slightest yellow or brown tone. In its presence, nitric acid must be added when the charge is decomposed by hydrochloric acid, otherwise it will not dissolve completely. All the mercury is then brought down by hydrogen sulphide. Mercury and antimony sometimes occur together, in which case the sulphides are separated by means of sodium sul- phide.
3. The filtrate from the foregoing is boiled until free from hydrogen sulphide, filtered if necessary, and rendered alkaline with ammonia.
What to read after India Rubber Laboratory Practice?
You can find similar books in the "Read Also" column, or choose other free books by William Augustus Caspari to read onlineMoreLess
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