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QuicKey Human ALB(Albumin) ELISA Kit

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Price:   $390
Cat Number:  E-TSEL-H0029
Lead Time:   7~10 days

Reactivity:  Human

Detection Range:  1.56~100 ng/mL

Sensitivity:  0.30 ng/mL

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Product Details

QuicKey Series

Get more sensitive and precise results with saving at least 1h comparing to traditional ELISA Kits. The new developed technology in house will help to accelerate your science research in a more efficient way.

Properties

Assay type Sandwich-ELISA
Format 96T/48T
Assay time 2.5 h
Reactivity Human
Detection method Colormetric
Colormetric 1.56-100 ng/mL
Sensitivity 0.30 ng/mL
Sample volume 50μL/well
Sample type serum, plasma
Specificity This kit recognizes Human ALB in samples. No significant cross-reactivity or interference between Human ALB and analogues was observed.
Reproducibility Both intra-CV and inter-CV are < 10%.
Application This ELISA kit applies to the in vitro quantitative determination of Human ALB concentrations in serum, plasma. Please consult technical support for the applicability if other biological fluids need to be tested.

Test principle

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human ALB. Samples (or Standards) and biotinylated detection antibody specific for Human ALB are added to the micro ELISA plate wells. Human ALB would combine with the specific antibody. Then Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human ALB, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 ± 2 nm. The OD value is proportional to the concentration of Human ALB. You can calculate the concentration of Human ALB in the samples by comparing the OD of the samples to the standard curve.

Kit components & Storage

An unopened kit can be stored at 2-8℃ for six months. After test, the unused wells and reagents should be stored according to the table below. (The specific components might be slightly different in delivered kits, please refer to the manual for more information.)

Item Specifications Storage conditions after test
Micro ELISA Plate (Dismountable) 96T: 8 wells ×12 strips
48T: 8 wells ×6 strips
2-8℃, 1 month
Reference Standard 96T: 2 vials
48T: 1 vial
Discard unused reconstituted standard and dilutions
Reference Standard & Sample Diluent 1 vial, 20 mL 2-8℃
Biotinylated Detection Ab Working Solution 1 vial, 6 mL
HRP Conjugate Diluent 1 vial, 14 mL
Concentrated Wash Buffer (25×) 1 vial, 30 mL
Concentrated HRP Conjugate (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
2-8℃ (Protect from light)
Substrate Reagent 1 vial, 10 mL
Stop Solution 1 vial, 10 mL 2-8℃
Plate Sealer 5 pieces
Product Description 1 copy
Certificate of Analysis 1 copy

Note: All reagent bottle caps must be tightened to prevent evaporation and microbial pollution. The volume of reagents in partial shipments is a little more than the volume marked on the label, please use accurate measuring equipment instead of directly pouring into the vial(s).

Other supplies required

1. Microplate reader with 450nm wavelength filter

2. High-precision transfer pipette, EP tubes and disposable pipette tips

3. Incubator capable of maintaining 37℃

4. Deionized or distilled water

5. Absorbent paper

6. Loading slot for Wash Buffer

Technical Data

Sample values

sandwich-Ab-ELISA-Elabscience

Typical Standard Curve

As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.

Concentration(ng/mL) 100 50 25 12.5 6.25 3.13 1.56 0
OD 2.618 2.044 1.412 0.872 0.598 0.38 0.219 0.078
Corrected OD 2.54 1.966 1.334 0.794 0.52 0.302 0.141 -
sandwich-Ab-ELISA-Elabscience

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human ALB were tested 20 times on one plate, respectively.

Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human ALB were tested on 3 different plates, 20 replicates in each plate.

Intra-assay Precision Inter-assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean(ng/mL) 4.06 10.37 43.36 4.47 10.60 44.40
Standard deviation 0.24 0.48 1.99 0.25 0.52 1.84
CV (%) 5.91 4.63 4.59 5.59 4.91 4.14

Recovery

The recovery of Human ALB spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

Sample Type Range (%) Average Recovery (%)
Serum(n=8) 87-101 95
EDTA plasma(n=8) 94-108 102

Linearity

Samples were spiked with high concentrations of Human ALB and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Serum(n=4) EDTA plasma (n=4)
1:2 Range (%) 100-108 89-98
Average (%) 104 93
1:4 Range (%) 90-101 98-106
Average (%) 94 101
1:8 Range (%) 93-102 93-108
Average (%) 97 101
1:16 Range (%) 96-110 93-104
Average (%) 102 101

Target information

Background

ALB is the most abundant protein in human plasma and serum. This protein is normally present in serum at concentrations ranging from 30 to 50 mg/mL and accounts for approximately 60% of the total protein content in serum [1]. ALB has a molecular weight of 66.7 kDa and is composed of a single polypeptide chain with 585 amino acids and 17 disulfide bonds. ALB is involved in many physiological processes. For instance, this protein aids in the regulation of osmotic pressure and pH in blood. In addition, ALB mediates lipid metabolism, sequesters toxins, and works as an antioxidant (i.e., it binds free radicals) [2]. Another important function of ALB is its action as a transport protein for a wide range of solutes that include some low mass hormones, fatty acids, and drugs
1. Hassan M, Azzazy E, Christenson R H. All About Albumin: Biochemistry, Genetics, and Medical Applications. Theodore Peters, Jr. San Diego, CA: Academic Press, 1996, 432 pp, $85.00. ISBN 0-12-552110-3[J]. 1997.
2. Otagiri M. A molecular functional study on the interactions of drugs with plasma proteins [J]. Drug metabolism and pharmacokinetics, 2005, 20(5): 309-323.

Research area

Database Links

SwissProt P02768 Human
Entrez Gene 213 Human

Synonyms

Serum albumin

Documents

Citations

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Assay procedures

1. Add 50μL standard or sample to the wells, immediately add 50μL Biotinylated Detection Ab working solution to each well. Incubate for 90 min at 37°C
2. Aspirate and wash the plate for 3 times
3. Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times
4. Add 90μL Substrate Reagent. Incubate for 15 min at 37°C
5. Add 50μL Stop Solution
6. Read the plate at 450nm immediately. Calculation of the results
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