期刊
BIOSENSORS-BASEL
卷 12, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/bios12050326
关键词
platinum cobalt nanoalloy; molecularly imprinted polydopamine; graphene oxide; tartrazine; electrochemical sensor
资金
- Science and Technology Program of Zhejiang Province of China [LGF22B050008]
- National Innovative Training Program for College Students [201610354019]
- Science and Technology Innovation Programof Zhejiang Province's University Student [2014R417005]
A novel electrochemical sensor was developed for the recognition and detection of tartrazine. The sensor showed a large and specific response to tartrazine due to the synergistic effect of the strong electrocatalytic activity of PtCo nanoalloy-decorated graphene oxide and the high tartrazine recognition ability of the imprinted cavities. The sensor exhibited good performance in terms of detection limit, anti-interference ability, stability, and reproducibility, and was successfully applied to detect tartrazine in spiked food samples.
A novel electrochemical sensor designed to recognize and detect tartrazine (TZ) was constructed based on a molecularly imprinted polydopamine (MIPDA)-coated nanocomposite of platinum cobalt (PtCo) nanoalloy-functionalized graphene oxide (GO). The nanocomposites were characterized and the TZ electrochemical detection performance of the sensor and various reference electrodes was investigated. Interestingly, the synergistic effect of the strong electrocatalytic activity of the PtCo nanoalloy-decorated GO and the high TZ recognition ability of the imprinted cavities of the MIPDA coating resulted in a large and specific response to TZ. Under the optimized conditions, the sensor displayed linear response ranges of 0.003-0.180 and 0.180-3.950 mu M, and its detection limit was 1.1 nM (S/N = 3). The electrochemical sensor displayed high anti-interference ability, good stability, and adequate reproducibility, and was successfully used to detect TZ in spiked food samples. Comparison of important indexes of this sensor with those of previous electrochemical sensors for TZ revealed that this sensor showed improved performance. This surface-imprinted sensor provides an ultrasensitive, highly specific, effective, and low-cost method for TZ determination in foodstuffs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据