Color Reaction Product of Urea with Diacetyl Monoxime and Glucuronolactone. I. On the Reaction of Urea Derivatives with Diacetyl Monoxime and Glucuronolactone

Ueda, Yo; Uchida, Junichi; Kuroki, Junko; Toyonaga, Kuniko; Watanabe, Yoshiko; Momose, Takeshi

doi:10.1248/cpb.16.2442

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3, [VII]) postulated by Lugosi et al (1972) was indeed the protochromogen. Butler and co-workers Butler and Walsh 1982) argued that the diureide is a byproduct and discounted other previous proposals for the key species (such as [IX] and [X]) with an investigation that provided evidence for a 'skipped diene' [XI], which had been postulated by Ueda et al (1968). suggested a mechanism for the generation of this intermediate and its subsequent oxidation to form a coloured carbonium ion [XII], which has since been cited in reviews on the determination of urea (Taylor and Vadgama 1992;Francis et al 2002).…”

Section: An Elusive Chromophorementioning

confidence: 98%

The determination of urea in soil extracts and related samples—a review

2004

View full text Add to dashboard Cite

Although the dominant methods for the determination of urea in clinical applications incorporate selective enzymatic hydrolysis of urea, the determination of urea in soil extracts is complicated by the presence of urease inhibitors. The spectrophotometric determination of urea with an acidic solution diacetyl monoxime and semicarbazide is a viable option but traditional manual procedures are time-consuming. New variations on these procedures, based on microplates or flow-injection analysis methodologies, allow a far greater number of samples to be analysed with high precision and sensitivity.

show abstract