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人糖抗原19-9(CA19-9)酶聯(lián)免疫吸附檢測試劑盒

ELK1198

規(guī)格：	價(jià)格：
48T	￥1680.00
96T	￥2400.00

下載說明 ①

Overview

Product name:	Human CA19-9(Carbohydrate Antigen 19-9) ELISA Kit
Reactivity:	Human
Alternative Names:	sialylated Lewis(a)Antigen; Cancer Antigen 19-9
Assay Type:	Sandwich
Sensitivity:	0.28 U/mL
Standard:	50 U/mL
Detection Range:	0.79-50 U/mL
Sample Type:	Serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids.
Assay Length:	3.5h
Research Area:	Tumor immunity;Hepatology;Gastroenterology;
Test principle:	The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Human CA19-9. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human CA19-9. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Human CA19-9, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Human CA19-9 in the samples is then determined by comparing the OD of the samples to the standard curve.

標(biāo)準(zhǔn)曲線

Concentration (U/mL)	OD	Corrected OD
50.00	1.882	1.796
25.00	1.517	1.431
12.50	1.035	0.949
6.25	0.782	0.696
3.13	0.541	0.455
1.57	0.354	0.268
0.79	0.232	0.146
0.00	0.086	0.000

精密度

Intra-assay Precision (Precision within an assay)：CV%<8%

Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.

Inter-assay Precision (Precision between assays)：CV%<10%

Three samples of known concentration were tested in forty separate assays to assess inter-assay precision.

回收率

Matrices listed below were spiked with certain level of recombinant CA19-9 and the recovery rates were calculated by comparing the measured value to the expected amount of CA19-9 in samples.

Matrix	Recovery range	Average
serum(n=5)	82-95%	88%
EDTA plasma(n=5)	90-103%	96%
Heparin plasma(n=5)	85-97%	91%

線性

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of CA19-9 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.