Sensitive and Selective Carmine Acid Detection Based on Chemiluminescence Quenching of Layer Doubled Hydroxide-Luminol-HO System.

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ID: 20729
2018
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Abstract
Carminic acid (CA) extracted from cochineal is widely used in food additives as a natural colorant, and its potential risk to human health makes its detection important. In this work, a layered doubled hydroxide (LDH)-luminol-HO system-based chemiluminescence (CL) platform has been successfully applied for CA sensing. The principle detection consists of two steps: first, LDH adsorbs CA onto the surface via electrostatic attraction; second, CA quenches the CL of the LDH-luminol-HO system via the synergistic effect of CL resonance energy transfer, reduction of reactive oxygen species, and occupation of positively charged centers of brucite-like layers. With this CL approach, 0.5 μM CA is detectable using a CL spectrometer, and the limit of detection is 0.03 μM. This CL system exhibited a linear response to CA in the concentration range from 0.5 to 10 μM. In addition, the practical application of the designed CL sensing system is evaluated with dried pork slice samples.
Reference Key
pan2018sensitiveacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Pan, Feng;Zhang, Yilin;Yuan, Zhiqin;Lu, Chao;
Journal ACS omega
Year 2018
DOI
10.1021/acsomega.8b02342
URL
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