Dictionary > Orcinol test

Orcinol test

Definition
noun
A method used to detect the presence of pentoses with a test reagent consisting of orcinol, HCl and ferric chloride.
Supplement
This test is used to detect the presence of a pentose in urine. In the presence of pentoses, the test reagent dehydrates pentoses to form furfural. Furfural, then, reacts with orcinol. The iron ion in the test reagent will produce a bluish product. Thus, a bluish solution with which precipitate may form indicates positive for (or the presence of) pentoses.

Synonym: Bial’s test, Bial’s orcinol test.

See also: orcinol, pentose.


You will also like...

Plant Auxins
Plant Auxins – Phototropism & Geotropism

Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

Psychiatry and mental disorders
Psychiatry & Mental Disorders

Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..

Schematic diagram of DNA replication
DNA Structure & DNA Replication

DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

"Cronopio dentiacutus", a prehistoric mammal (an illustration)
Mammalian Ancestors

Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

Direct and indirect physiologic effects of growth hormone
Animal Growth Hormones

Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

Nephrolepis exaltata
Vascular Plants: Ferns and Relatives

Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..