English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this study, the alkaline ashing and derivatization conditions of our previous gas chromatographic determination of total bromine using 3-pentanone derivatization were improved for the analysis of agricultural products.A 2g sample (for cereals and beans), or a 5g sample (for vegetables and fruits) was ashed with 5ml of 5% potassium hydroxide in ethanol-water (1:1) mixture at 550°C for 5 hours. Bromide in a water extract of the ash residue was converted into the bromo derivative of 3-pentanone (BP), and then determined by capillary gas chromatography with an electron-capture detector. The addition of sulfamic acid to a water extract increased the peak height of BP, and suppressed the formation of the chloro derivative of 3-pentanone.Recoveries of bromide from agricultural products spiked at 5μg/g ranged from 87.2 to 96.8%. The detection limits were 0.05μg/g for cereals and beans, and 0.02μg/g for vegetables and fruits.

Improved Gas Chromatographic Determination of Total Bromine in Agricultural Products