About: Bial's test

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Bial's test is a chemical test for the presence of pentoses. It is named after Manfred Bial, a German physician. The components include orcinol, hydrochloric acid, and ferric chloride. A pentose, if present, will be dehydrated to form furfural which then reacts with the orcinol to generate a colored substance. The solution will turn bluish and a precipitate may form. The solution shows two absorption bands, one in the red between Fraunhofer lines B and C and the other near the D line. An estimate of the relevant wavelengths can be made by referring to the Fraunhofer lines article.

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  • Die Bial-Probe (oder auch Orcin-Test) ist ein spezifischer Test für Pentosen. Die Reaktion geht auf Manfred Bial (1869–1908) zurück. (de)
  • Bial's test is a chemical test for the presence of pentoses. It is named after Manfred Bial, a German physician. The components include orcinol, hydrochloric acid, and ferric chloride. A pentose, if present, will be dehydrated to form furfural which then reacts with the orcinol to generate a colored substance. The solution will turn bluish and a precipitate may form. The solution shows two absorption bands, one in the red between Fraunhofer lines B and C and the other near the D line. An estimate of the relevant wavelengths can be made by referring to the Fraunhofer lines article. (en)
  • Le test de Bial est un des pentoses. (fr)
  • O teste de Bial é um teste químico para detectar a presença de pentoses. Foi nomeado em homenagem a Manfred Bial, um médico alemão. Os componentes do reagente de Bial, solução usada no teste, são orcinol, ácido clorídrico e cloreto férrico. Caso haja pentose na amostra analisada, ela é desidratada a furfural, que, então, reage com o orcinol para gerar uma substância colorida. A solução fica azulada e pode formar-se um precipitado. O espectro dessa solução mostra duas bandas de absorção, uma no vermelho entre as linhas B e C de Fraunhofer e a outra perto da linha D. (pt)
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  • Pentoses (en)
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  • Colorimetric method (en)
dbp:name
  • Bial's test (en)
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  • Die Bial-Probe (oder auch Orcin-Test) ist ein spezifischer Test für Pentosen. Die Reaktion geht auf Manfred Bial (1869–1908) zurück. (de)
  • Bial's test is a chemical test for the presence of pentoses. It is named after Manfred Bial, a German physician. The components include orcinol, hydrochloric acid, and ferric chloride. A pentose, if present, will be dehydrated to form furfural which then reacts with the orcinol to generate a colored substance. The solution will turn bluish and a precipitate may form. The solution shows two absorption bands, one in the red between Fraunhofer lines B and C and the other near the D line. An estimate of the relevant wavelengths can be made by referring to the Fraunhofer lines article. (en)
  • Le test de Bial est un des pentoses. (fr)
  • O teste de Bial é um teste químico para detectar a presença de pentoses. Foi nomeado em homenagem a Manfred Bial, um médico alemão. Os componentes do reagente de Bial, solução usada no teste, são orcinol, ácido clorídrico e cloreto férrico. Caso haja pentose na amostra analisada, ela é desidratada a furfural, que, então, reage com o orcinol para gerar uma substância colorida. A solução fica azulada e pode formar-se um precipitado. O espectro dessa solução mostra duas bandas de absorção, uma no vermelho entre as linhas B e C de Fraunhofer e a outra perto da linha D. (pt)
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  • Bial's test (en)
  • Bial-Probe (de)
  • Test de Bial (fr)
  • Teste de Bial (pt)
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