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QuicKey Human IgG(Immunoglobulin G) ELISA Kit

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Price:   $390
Cat Number:  E-TSEL-H0011
Lead Time:   7~10 days

Reactivity:  Human

Detection Range:  1.56~100 ng/mL

Sensitivity:  0.64 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 0.64 ng/mL
Sample volume 50μL/well
Sample type serum, plasma, urine, saliva
Specificity This kit recognizes Human IgG in samples. No significant cross-reactivity or interference between Human IgG 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 IgG concentrations in serum, plasma, urine, saliva. 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 IgG. Samples (or Standards) and biotinylated detection antibody specific for Human IgG are added to the micro ELISA plate wells. Human IgG 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 IgG, 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 IgG. You can calculate the concentration of Human IgG 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 2.532 2.078 1.476 1.035 0.635 0.405 0.245 0.111
Corrected OD 2.421 1.967 1.365 0.924 0.524 0.294 0.134 -
sandwich-Ab-ELISA-Elabscience

Precision

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

Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human IgG 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) 4.91 11.20 44.60 4.94 11.66 47.68
Standard deviation 0.26 0.51 1.95 0.25 0.56 2.24
CV (%) 5.30 4.55 4.37 5.06 4.80 4.70

Recovery

The recovery of Human IgG 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) 87-98 93
EDTA plasma(n=8) 91-100 95
Urine(n=8) 83-107 94

Linearity

Samples were spiked with high concentrations of Human IgG 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) Urine(n=4)
1:2 Range (%) 85-96 87-97 86-94
Average (%) 90 94 91
1:4 Range (%) 89-98 85-99 88-97
Average (%) 93 92 91
1:8 Range (%) 87-102 92-102 94-107
Average (%) 94 95 99
1:16 Range (%) 86-98 91-103 86-98
Average (%) 91 97 90

Target information

Background

Immunoglobulin G (IgG) is a class of immunoglobulins found in all body fluids. They are the smallest but most common antibodies (75 percent to 80 percent) in the body. IgG antibodies are large molecules of about 150 kDa[1], made of four peptide chains. It contains two identical class γ heavy chains of about 50 kDa and two identical light chains of about 25 kDa, thus a tetrameric quaternary structure. IgG antibodies are very important in fighting bacterial and viral infections, and they are the only type of antibody that can cross the placenta in a pregnant woman to help the fetus. The measurement of immunoglobulin G can be a diagnostic tool for certain conditions, such as autoimmune hepatitis, if indicated by certain symptoms. Clinically, measured IgG antibody levels are generally considered to be indicative of an individual's immune status to particular pathogens. A common example of this practice are titers drawn to demonstrate serologic immunity to measles, mumps, and rubella (MMR), hepatitis B virus, and varicella (chickenpox) [2].
1. Jr C A J, Travers P, Walport M, et al. Principles of innate and adaptive immunity [J]. 2001.
2. Faruque A A, Maoya J, et al. Analysis of surface plasmon resonance biosensors for protein detection. 2016.

Research area

Database Links

SwissProt Human
Entrez Gene Human

Synonyms

IgG

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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