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Wu E, Feng K, Shi R, Lv R, Ouyang F, Li SSC, Zhong J, Liu J. Hybrid CuCoO-GO enables ultrasensitive detection of antibiotics with enhanced laser desorption/ionization at nano-interfaces. Chem Sci 2018; 10:257-267. [PMID: 30713636 PMCID: PMC6333240 DOI: 10.1039/c8sc03692f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 10/05/2018] [Indexed: 01/21/2023] Open
Abstract
The soaring concerns globally on antibiotic overuse have made calls for the development of rapid and sensitive detection methods urgent. Here we report that the hybrid CuCoO-GO matrix allows for sensitive detection of various antibiotics in combination with MALDI TOF MS. The new matrix is composed of few-layered GO nanosheets decorated with CuCoO nanoparticles with an average size of 10 nm, and exhibits excellent aqueous suspensibility. Accurate quantitation of the sulfonamide antibiotics in milk samples have been demonstrated using a CuCoO-GO matrix and a stable isotope (C13)-labeled analyte as the internal standard. Our experiments have achieved lower limits of detection (LOD) by several hundred fold for the detection of a panel of representative antibiotics, in comparison with the literature reports. Both intrabacterial and extrabacterial residual antibiotics can be sensitively detected with our method. We have further investigated the molecular mechanism of the enhanced desorption/ionization efficiency by the CuCoO-GO matrix with synchrotron radiation techniques for the first time. This work provides a sensitive matrix enabling MALDI-TOF MS to be applied in small molecular analysis, but also presents a distinct perspective on the mechanism behind the material functions.
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Affiliation(s)
- Enhui Wu
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Kun Feng
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Rui Shi
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Rui Lv
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Fuzhong Ouyang
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Shawn S C Li
- Department of Biochemistry , Western University , London , Ontario N6A 5C1 , Canada
| | - Jun Zhong
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
| | - Jian Liu
- Institute of Functional Nano and Soft Materials (FUNSOM) , Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices , Joint International Research Laboratory of Carbon-based Functional Materials and Devices , Soochow University , Suzhou , Jiangsu Province 215123 , China . ;
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Srivastava A, Waterhouse D, Ardrey A, Ward SA. Quantification of rifampicin in human plasma and cerebrospinal fluid by a highly sensitive and rapid liquid chromatographic-tandem mass spectrometric method. J Pharm Biomed Anal 2012; 70:523-8. [PMID: 22709606 PMCID: PMC3458211 DOI: 10.1016/j.jpba.2012.05.028] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Revised: 05/21/2012] [Accepted: 05/23/2012] [Indexed: 11/17/2022]
Abstract
A highly sensitive and rapid liquid chromatography tandem mass spectrometry (LC-MS/MS) method has been developed to measure the levels of the antitubercular drug rifampicin (RIF) in human plasma and cerebrospinal fluid (CSF). The analyte and internal standard (IS) were isolated from plasma and CSF by a simple organic solvent based precipitation of proteins followed by centrifugation. Detection was carried out by electrospray positive ionization mass spectrometry in the multiple-reaction monitoring (MRM) mode. The assay was linear in the concentration range 25-6400 ng/mL with intra- and inter-day precision of <7% and <8%, respectively. The validated method was applied to the study of RIF pharmacokinetics in human CSF and plasma over 25 h period after a 10 mg/kg oral dose.
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Affiliation(s)
- Abhishek Srivastava
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, United Kingdom.
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