Abstract：
:Montmorillonite calcium (MMT-Ca) was functionalized with cetyltrimethylammonium bromide (CTAB) via cationic exchange effects. Compared with MMT-Ca, the resulting CTAB functionalized MMT-Ca (CTAB/MMT-Ca) greatly increased the oxidation peak current of sunset yellow, indicative of strong signal enhancement effects. The oxidation mechanism was studied, and one electron was transferred during the oxidation of sunset yellow. The influences of pH value, mass ratio of CTAB to MMT-Ca, amount of CTAB/MMT-Ca, and accumulation time were studied on the oxidation signal of sunset yellow. As a result, a highly-sensitive, rapid and simple electrochemical method was newly developed for the determination of sunset yellow. The linear ranger was from 2.5 to 200 nM, and the detection limit was as low as 0.71 nM after 1-min accumulation. This method was applied in soft drink samples, and the detected results consisted with the values that obtained by high-performance liquid chromatography.
journal_name
Food Chemjournal_title
Food chemistryauthors
Songyang Y,Yang X,Xie S,Hao H,Song Jdoi
10.1016/j.foodchem.2014.10.075subject
Has Abstractpub_date
2015-04-15 00:00:00pages
640-4eissn
0308-8146issn
1873-7072pii
S0308-8146(14)01637-9journal_volume
173pub_type
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