KR20130100024A - 게이트형 전압 전류 측정 분석 구간 결정 방법 - Google Patents
게이트형 전압 전류 측정 분석 구간 결정 방법 Download PDFInfo
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- KR20130100024A KR20130100024A KR1020137022121A KR20137022121A KR20130100024A KR 20130100024 A KR20130100024 A KR 20130100024A KR 1020137022121 A KR1020137022121 A KR 1020137022121A KR 20137022121 A KR20137022121 A KR 20137022121A KR 20130100024 A KR20130100024 A KR 20130100024A
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Abstract
Description
분석물 | 효소 | 매개물질 |
글루코오스 | 글루코오스 산화효소 | 페리시안 화합물(ferricyanide) |
글루코오스 | 글루코오스 탈수소효소 | 페리시안 화합물 |
콜레스테롤 | 클레스테롤(cholesterol) 산화효소 | 페리시안 화합물 |
유산염(lactate) | 유산염 산화효소 | 페리시안 화합물 |
요산(uric acid) | 요산 분해 효소(uricase) | 페리시안 화합물 |
알코올 | 알코올 분해효소 | 페닐렌디아민(phenylenediamine) |
도 1a는 조립된 센서 스트립의 사시도이다.
도 1b는 덮개를 제거한 상태의 센서 스트립의 상면도이다.
도 2는 도 1b의 센서 스트립의 단면도이다.
도 3a 및 도 3b는 긴 리드 펄스(long read pulse) 및 짧은 리드 펄스(short read pulse)의 적용 동안 표면 도체와 확산 배리어 층(DBL)을 가진 워킹 전극을 나타낸 도면이다.
도 4a 및 도 4b는 확산 배리어 층(DBL)이 짧은 여기와 결합된 때 측정 정확성의 개선을 나타내는 그래프이다.
도 5는 시료에서 분석물의 존재와 농도를 결정하는 전기 화학적 분석방법을 나타낸다.
도 6a 내지 도 6f는 시료의 도입 후에 복수의 듀티 사이클(duty cycle)이 센서 스트립에 인가되는 6개의 펄스 시퀀스의 예를 나타낸다.
도 7a는 센서 시스템으로부터의 순환 전류전압 곡선(cyclic voltammogram)을 나타내는 그래프이다.
도 7b는 비순환 스캔의 순방향 여기가 산화 환원 반응 쌍에 대한 형식적인 전위 E°’의 근방에서 시작하는 비순환 스캔과 순환 스캔을 비교하는 도면이다.
도 7c는 역방향 스캔이 역방향 전류 피크를 차단하는 비순환 스캔을 나타낸다.
도 7d는 DLC 영역에 포개진 순환 스캔과 비순환 스캔을 나타낸다.
도 8a 내지 도 8d는 50, 100 및 400 mg/dL 글루코오스를 함유하는 40% 헤마토크리트 전혈(WB) 시료에 대하여 도 6c에 나타낸 펄스 시퀀스로부터 전류전압 곡선으로 그려진 출력전류를 나타낸다.
도 9a 내지 도 9c는 도 8a 내지 도 8c의 전류전압 곡선의 윤곽 프로파일을 나타낸다.
도 10a는 도 7a의 순환 전류전압 곡선에 대응하는 세미-적분 그래프이다.
도 10b는 도 7c의 비순환 전류전압 곡선에 대응하는 비순환 데이터의 세미-적분을 나타낸다.
도 10c는 도 7b의 순환 및 비순환 여기의 세미-적분을 나타낸다.
도 10d는 도 7d의 비순환 여기에 대한 세미-적분 및 기록된 전류 값을 나타낸다.
도 11은 여러 가지 양의 글루코오스를 함유하는 전혈(WB) 시료에 대한 7 여기 펄스 시퀀스로부터 세미-적분 전류전압 곡선에 의하여 제공된 윤곽 프로ㅎ파일을 나타낸다.
도 12a는 20% 헤마토크리트 전혈(WB) 시료에서 16mM 페로시안 화합물의 순환 전류전압 곡선, 세미-적분 및 세미-도함수를 도시한 도면이다.
도 12b는 도 12a의 세미-도함수 곡선을 확대한 도면이다.
도 13a 내지 도 13c는 순환 전류전압 곡선의 도함수를 도시한 도면이다.
도 14는 도 11의 윤곽 프로파일에 대한 시간 함수로서 기록된 세미-적분 전류를 도시한 도면이다.
도 15는 언더-필(under-fill)된 센서 스트립으로부터 얻은 순환 전류전압 곡선을 도시한 도면이다.
도 16a는 전형(WB)에 100 mg/dL 글루코오스와 40% 헤마토크리트를 포함하는 시료에 대한 1 V/sec 스캔 속도로 5개 센서 스트립에서 얻은 순환 전류전압 곡선의 세미-적분을 도시한 도면이다.
도 16b는 효소 농도의 함수로서 0.15 전위에서 취한 순방향 및 역방향 스캔 전류의 비율을 도시한 도면이다.
도 16c는 GO 내용물(%-건조중량)의 함수로서 센서 스트립의 선형 응답 교정(linear response calibration) 슬로프(slope)의 전형적인 응답을 도시한 도면이다.
도 17은 측정 디바이스를 개략적으로 도시한 도면이다.
산화 환원 효소(시약 층) | 분석물 |
글루코오스 탈수소효소(glucose dehydrogenase) | β-글루코오스 |
글루코오스 산화효소(glucose oxidase) | β-글루코오스 |
콜레스테롤 에스테라아제(cholesterol esterase); 콜레스테롤 산화효소(cholesterol oxidase) |
콜레스테롤 |
지방 단백질 리파아제(Lipoprotain lipase); 글리세롤 키나아제(glycerol kinase); 글리세롤-3-인삼염 산화효소(glycerol-3-phosphate oxidase) |
트리글리세리드 (triglycerides) |
유산염 산화효소(lactate oxidase); 유산염 탈수소효소(lactate dehydrogenase); 디아포라제(diaphorase) |
유산염 |
파이루베이트 산화효소(pyruvate oxidase) | 파이루베이트 |
알코올 산화효소 | 알코올 |
빌리루빈 산화효소(bilirubin oxidase) | 빌리루빈 |
유리카제(uricase) | 요산 |
글루타티온 환원효소(glutathione reductase) | NAD(P)H |
탄소 일산화물 산화환원효소(carbon monoxide oxidoreductase) | 탄소 일산화물 |
175: 워킹 전극
185: 카운터 전극
Claims (6)
- 혈액 시료에서 글루코오스의 농도를 결정하기 위한 펄스 시퀀스의 존속 구간을 결정하는 방법으로서, 상기 펄스 시퀀스는 적어도 3 듀티 사이클을 포함하고 상기 적어도 3 듀티 사이클의 각각은 여기를 포함하며,
상기 적어도 3 듀티 사이클 동안 기록된 전류로부터 복수의 교정 상수 세트를 결정하는 단계; 및
상기 적어도 3 듀티 사이클로부터 결정된 글루코오스 농도가 높은 글루코오스 농도를 나타낼 때, 상기 적어도 3 듀티 사이클로부터 결정된 글루코오스 농도에 대응하는 펄스 시퀀스의 존속 구간을 결정하는 단계를 포함하고,
상기 펄스 시퀀스의 상기 존속 구간은 상기 적어도 3 듀티 사이클로부터 결정된 상기 글루코오스의 농도가 상기 높은 글루코오스의 농도와 동일하거나 이하인 글루코오스 농도를 나타낼 때보다 짧은 것을 특징으로 하는 방법. - 제1항에 있어서,
상기 높은 글루코오스 농도는 150 mg/dL 보다 큰 것을 특징으로 하는 방법. - 제1항에 있어서,
상기 적어도 3 듀티 사이클로부터 결정된 글루코오스 농도가 150 mg/dL 보다 큰 글루코오스 농도를 나타낼 때, 상기 펄스 시퀀스는 최대 5개의 여기를 포함하는 것을 특징으로 하는 방법. - 제1항에 있어서,
상기 적어도 3 듀티 사이클로부터 결정된 글루코오스 농도가 150 mg/dL과 동일하거나 이하인 글루코오스 농도를 나타낼 때, 상기 펄스 시퀀스는 5개의 여기 이상을 포함하는 것을 특징으로 하는 방법. - 제1항에 있어서,
상기 펄스 시퀀스는 게이트형 전압 전류 측정 펄스 시퀀스인 것을 특징으로 하는 방법. - 제1항에 있어서,
상기 펄스 시퀀스를 카운터 전극 및 워킹 전극 상의 확산 배리어 층을 포함하는 센서 스트립에 인가하는 단계를 더 포함하는 것을 특징으로 하는 방법.
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