Author/Editor		Stojičević, Metka; Krbavčič, Aleš
Title		Sečnina - analitična monografija
Translated title		Urea - analytical monograph
Type		članek
Source		Farm Vestn
Vol. and No.		Letnik 52, št. 1
Publication year		2001
Volume		str. 45-53
Language		slo
Abstract		Urea, the amide of carbamic acid, was the first organic compound synthesized from inorganic compounds. It is used in agriculture as fertilizer and a feed supplement as well as in plastic and paper industry. Urea is given intravenously in the treatment of increased intra-ocular and intracranial pressure. Urea is applied topically in the treatment of psoriasis and other hyperkeratotic skin disorders. The majority of monographs specify classical analytical methods and IR spectroscopy for the identification of urea. Assay is done with the Kjeldahl method. For the quantification of urea in ointment spectrofotometric and HPTLC-denzitometric methods can be used. HPLC methods for quantitative analysis of urea in creams and fertilizers are also known.
Summary		Sečnina je amid karbaminske kisline in je prva organska substanca sintetizirana iz anorganskih spojin. Uporablja se v kmetijstvu, kot gnojilo in dodatek hrani za živali, ter v industriji papirja in plastike. Z intravenozno aplicirano raztopino sečnine znižujejo povišan intraokularni ter intrakranialni tlak. Dermatološke pripravke, ki vsebujejo sečnino, uporabljajo pri terapiji psoriaze in drugih hiperkeratotičnih obolenj kože. Večina monografij predpisuje za identifikacijo sečnine klasične analizne metode in IR spektroskopijo, za določitev vsebnosti pa Kjeldahlovo metodo. Za kvantitativno določitev sečnine v mazilih uporabljamo spektrofotometrično ali HPTLC-denzitometrično metodo. Sečnino v kremah in gnojilih lahko določamo z metodo tekočinske kromatografije visoke ločljivosti.
Descriptors		UREA CHROMATOGRAPHY, HIGH PRESSURE LIQUID