สืบค้นงานวิจัย
Highly selective and sensitive paper-based colorimetric sensor using thiosulfate catalytic etching of silver nanoplates for trace determination of copper ions
Chaiyo S. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Highly selective and sensitive paper-based colorimetric sensor using thiosulfate catalytic etching of silver nanoplates for trace determination of copper ions
ผู้แต่ง / หัวหน้าโครงการ (EN): Chaiyo S.
บทคัดย่อ (EN): A novel, highly selective and sensitive paper-based colorimetric sensor for trace determination of copper (Cu2+) ions was developed. The measurement is based on the catalytic etching of silver nanoplates (AgNPls) by thiosulfate (S2O3 2-). Upon the addition of Cu2+ to the ammonium buffer at pH 11, the absorption peak intensity of AuNPls/S2O3 2- at 522nm decreased and the pinkish violet AuNPls became clear in color as visible to the naked eye. This assay provides highly sensitive and selective detection of Cu2+ over other metal ions (K+, Cr3+, Cd2+, Zn2+, As3+, Mn2+, Co2+, Pb2+, Al3+, Ni2+, Fe3+, Mg2+, Hg2+ and Bi3+). A paper-based colorimetric sensor was then developed for the simple and rapid determination of Cu2+ using the catalytic etching of AgNPls. Under optimized conditions, the modified AgNPls coated at the test zone of the devices immediately changes in color in the presence of Cu2+. The limit of detection (LOD) was found to be 1.0ngmL-1 by visual detection. For semi-quantitative measurement with image processing, the method detected Cu2+ in the range of 0.5-200ngmL-1(R2=0.9974) with an LOD of 0.3ngmL-1. The proposed method was successfully applied to detect Cu2+ in the wide range of real samples including water, food, and blood. The results were in good agreement according to a paired t-test with results from inductively coupled plasma-optical emission spectrometry (ICP-OES). © 2015 Elsevier B.V.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938855110&doi=10.1016%2fj.aca.2015.01.042&partnerID=40&md5=eb7e011db7f01c773b75cc6a1df68e57
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): Thiosulfates
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

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Chaiyo S.. "Highly selective and sensitive paper-based colorimetric sensor using thiosulfate catalytic etching of silver nanoplates for trace determination of copper ions". ไม่ระบุหน่วยงาน. ม.ป.ป.

Chaiyo S.. "Highly selective and sensitive paper-based colorimetric sensor using thiosulfate catalytic etching of silver nanoplates for trace determination of copper ions". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Highly selective and sensitive paper-based colorimetric sensor using thiosulfate catalytic etching of silver nanoplates for trace determination of copper ions
Chaiyo S.
มหาวิทยาลัยมหิดล
ไม่ระบุวันที่เผยแพร่
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