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Objective A 4-mercaptobenzoic acid/polypeptide-modifiedgold nanoparticle modified surface enhanced Raman spectroscopy (SERS)sensor was developed for rapid detection ofAg ${}^{+ }$ in water. Methods $\;\mathrm{A}{\mathrm{{Ag}}}^{+ }$ surfaceenhanced Raman spectroscopy sensor was constructed by combining aspecificAg ${}^{+ }$ peptiderecognition sequence (RFPRGGDD) with 4-mercaptobenzoic acid, and datawas read using a portable Raman spectrometer. Results In theconcentration range of ${10}\sim {850}\mathrm{{nmol}}/\mathrm{L}$ ,the linear relationship was good, the correlation coefficient $\left({r}^{2}\right)$ was 0.98345, thelimit of detection was ${36}\mathrm{{pmol}}/\mathrm{L}$ , thestandard recoveries were ${95.28}\%\sim {102.9}\%$ , and therelative standard deviations were 0.79%~3.73%. Conclusion The method has high response speed, good selectivity and low detection limit, and is suitable for rapiddetection of Ag+ in water.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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