α-乳清蛋白(αLA)檢測試劑盒

適用生物 Homo sapiens (Human，人)
α-乳清蛋白(αLA)檢測試劑盒檢測范圍 31.25-2000pg/mL 靈敏度 12.7pg/mL
樣本類型 Serum, plasma, breast milk and other biological fluids.
實驗時長 4.5h 實驗方法 雙抗夾心法 α-乳清蛋白(αLA)檢測試劑盒規格 96T

α-乳清蛋白(αLA)檢測試劑盒    ELISA Kit for Alpha-Lactalbumin (aLA)
FOR IN VITRO AND RESEARCH USE ONLY, NOT FOR USE IN CLINICAL DIAGNOSTIC PROCEDURES!

Organism species Homo sapiens (Human)
Product No. SEB018Hu
Sample type Serum, plasma, breast milk and other biological fluids.
Format 96-well strip plate
Assay length 4.5 hours
Detection range 31.25-2000pg/mL The standard curve concentrations used for the ELISA’s were 2000pg/mL, 1000pg/mL, 500pg/mL, 250pg/mL, 125pg/mL, 62.5pg/mL, 31.25pg/mL
Sensitivity The minimum detectable dose of this kit is typically less than 12.7pg/mL.

Specificity
This assay has high sensitivity and excellent specificity for detection of Alpha-Lactalbumin (aLA).
No significant cross-reactivity or interference between Alpha-Lactalbumin (aLA) and analogues was observed.
Recovery
Matrices listed below were spiked with certain level of recombinant Alpha-Lactalbumin (aLA) and the recovery rates were calculated by comparing the measured value to the expected amount of Alpha-Lactalbumin (aLA) in samples.

Matrix Recovery range (%) Average(%)
serum(n=5) 92-99 95
EDTA plasma(n=5) 96-105 99
heparin plasma(n=5) 90-97 94

Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Alpha-Lactalbumin (aLA) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Alpha-Lactalbumin (aLA) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%
Linearity
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Alpha-Lactalbumin (aLA) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample 1:2 1:4 1:8 1:16
serum(n=5) 89-97% 96-105% 79-102% 95-105%
EDTA plasma(n=5) 80-95% 81-96% 78-91% 84-102%
heparin plasma(n=5) 95-103% 91-101% 85-103% 91-104%

Stability
The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition.
To minimize extra influence on the performance, operation procedures and lab conditions, especially room temperature, air humidity, incubator temperature should be strictly controlled. It is also strongly suggested that the whole assay is performed by the same operator from the beginning to the end.
Reagents and materials provided

Reagents Quantity Reagents Quantity
Pre-coated, ready to use 96-well strip plate 1 Plate sealer for 96 wells 4
Standard 2 Standard Diluent 1×20mL
Detection Reagent A 1×120μL Assay Diluent A 1×12mL
Detection Reagent B 1×120μL Assay Diluent B 1×12mL
TMB Substrate 1×9mL Stop Solution 1×6mL
Wash Buffer (30 × concentrate) 1×20mL Instruction manual 1

Assay procedure summary
1. Prepare all reagents, samples and standards;
2. Add 100μL standard or sample to each well. Incubate 2 hours at 37oC;
3. Aspirate and add 100μL prepared Detection Reagent A. Incubate 1 hour at 37oC;
4. Aspirate and wash 3 times;
5. Add 100μL prepared Detection Reagent B. Incubate 30 minutes at 37oC;
6. Aspirate and wash 5 times;
7. Add 90μL Substrate Solution. Incubate 15-25 minutes at 37oC;
8. Add 50μL Stop Solution. Read at 450nm immediay.
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 Alpha-Lactalbumin (aLA). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Alpha-Lactalbumin (aLA). 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 Alpha-Lactalbumin (aLA), 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 Alpha-Lactalbumin (aLA) in the samples is then determined by comparing the O.D. of the samples to the standard curve.