METHOD OF DETECTING METAL IONS BY MELANIN-SENSITIZED PIEZOELECTRIC SENSOR
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
G01N-033/20
G01N-033/20
G01N-029/00
G01N-029/00
출원번호
US-0110872
(2008-04-28)
공개번호
US-0107217
(2009-04-30)
우선권정보
TW-096140631(2007-10-29)
발명자
/ 주소
Huang, Gue Wha
출원인 / 주소
Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture
대리인 / 주소
OCCHIUTI ROHLICEK & TSAO, LLP
인용정보
피인용 횟수 :
0인용 특허 :
0
초록
The present invention provides a metal-ion sensor characterized by coating the gold electrode of a quartz crystal microbalance (QCM) with melanin, whereby the sensor has an enhanced sensitivity to metal ions.
대표청구항▼
What is claimed is: 1. A quartz crystal microbalance for detecting metal ions, wherein the electrode is sensitized by melanin. 2. The quartz crystal microbalance of claim 1, wherein the melanin is tea melanin. 3. The quartz crystal microbalance of claim 2, wherein the tea melanin is prepared fr
What is claimed is: 1. A quartz crystal microbalance for detecting metal ions, wherein the electrode is sensitized by melanin. 2. The quartz crystal microbalance of claim 1, wherein the melanin is tea melanin. 3. The quartz crystal microbalance of claim 2, wherein the tea melanin is prepared from Thea sinensis Linn. 4. The quartz crystal microbalance of claim 1, wherein the melanin coated on the electrode is in an amount of 0.1-100 ng in total. 5. The quartz crystal microbalance of claim 4, wherein the melanin coated on the electrode is in an amount of 1-10 ng in total. 6. The quartz crystal microbalance of claim 5, wherein the melanin coated on the electrode is in an amount of 5.3 ng in total. 7. The quartz crystal microbalance of claim 1, wherein the metal ions are heavy metal ions. 8. The quartz crystal microbalance of claim 7, wherein the heavy metal ions are selected from the group consisting of: Hg2+, Sn2+, Ge4+, Li+, Zn2+, Cu2+, Bi3+, Co2+, Al3+, Ni2+, Ag+, Fe3+, Mn7+, Pb2+, Cd2+, and Cr3+. 9. The quartz crystal microbalance of claim 2, wherein the tea melanin is obtained by purifying via acid hydrolysis and centrifugation, and sequestered from any impurity. 10. A a method of detecting metal ions in a liquid sample, comprising the following steps: (a) preparing a liquid sample containing a species of metal ions; (b) detecting various concentrations of said species of metal ions with a melanin-coated electrode to acquire a specific resonant frequency for each of the various concentrations, and inferring a standard curve from the acquired frequencies; (c) acquiring the resonant frequency of the liquid sample of step (a); and (d) comparing the specific frequency acquired in step (c) to the standard curve of step (b) to obtain the concentration of the metal ions in the liquid sample. 11. The method of claim 10, wherein the melanin is tea melanin. 12. The method of claim 11, wherein the tea melanin is prepared from Thea sinensis Linn. 13. The method of claim 10, wherein the melanin coated on the electrode is in an amount of 0.1-100 ng in total. 14. The method of claim 13, wherein the melanin coated on the electrode is in an amount of 1-10 ng in total. 15. The method of claim 14, wherein the melanin coated on the electrode is in an amount of 5.3 ng in total. 16. The method of claim 10, wherein the metal ions are heavy metal ions. 17. The method of claim 16, wherein the heavy metal ions are selected from the group consisting of: Hg2+, Sn2+, Ge4+, Li+, Zn2+, Cu2+, Bi3+, Co2+, Al3+, Ni2+, Ag+, Fe3+, Mn7+, Pb2+, Cd2+ and Cr3+. 18. The method of claim 11, wherein the tea melanin is obtained by purifying via acid hydrolysis and centrifugation, and sequestered from any impurity.
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