Bulletin - Bureau of Chemistry Volume 13, Pts. 1-10

Bulletin - Bureau of Chemistry Volume 13, Pts. 1-10

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ...say where the line should be drawn. Harmless vegetable pigments, it may be said, can be used without endangering the health of the consumer. The same is true of the like compounds of insect origin like cochineal. Some of the coal ta-r colors are also said to be without injurious effect, but this statement can not be made to apply to the whole family of aniline dyes, perhaps the most frequent colors in candies. Among the colors found in the samples examined may be mentioned cochineal, eosin, and other aniline dyes, and ultrama-rine. ANALYSES BY MR. HUSTON. Mineral coloring matter was found in Nos. 153 and 176. The nature of the base is not stated, but it is noted that both these samples eontain ultramarine. Organic coloring matters were found in 20 of the samples equivalent to 80 per cent. One of the samples had an offensive odor. Sample No. 158 hfi/ll nearly 45 per cent of flour, which accounts in part, also, for its large percentage of ash. Eleven samples contain notable quantities Of glucose. Other samples containing large quantities of starch and gllm are 159, 172, 174, 175, and 176. This latter sample contains nearly 7 per cent of ash, which is almost high enough to point to the use of terra alba. This idea is corroborated by the fact that the insoluble portion and the ash are almost identical in amount. On the contrary, itcau be urged with better reason that the adulteration with so small a portion of an inert earth would not prove financially profitable. The weight of the evidence is against the theory of such an admixture. Inasmuch as a mineral coloring matter was found in this sample, 1t may be that the high percentage of ash can be traced to this source. In nearly all the samples it is noticed that sucrose forms the bulk of...show more

Product details

  • Paperback | 540 pages
  • 189 x 246 x 28mm | 953g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236769783
  • 9781236769787