Human IL-6(Interleukin 6) ELISA Kit

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This kit is based on Double antibody-Sandwich ELISA detection method and takes 4h assay time. The microplate provided in this kit has been precoated with anti IL-6 antibody. Add standard and properly diluted sample into relevant well respectively. After incubation, wash unbound components. Add biotinylated detection antibody. Then, it binds with IL-6 bound to precoated antibody. Wash unbound components and add HRP-Streptavidin Conjugate (SABC). Wash unbound components again and add TMB substrate solution. Then, TMB was catalyzed by HRP to produce a blue color product that turned yellow after adding a stop solution. Read the O.D. absorbance at 450nm in a microplate reader. Calculate the concentration of IL-6 in the sample by plotting standard curve. The concentration of the target substance is proportional to the OD450 value.

Catalogue No.: 
EH0201
Alias: 
Interleukin-6 ELISA Kit, IL-6 ELISA Kit, B-cell stimulatory factor 2 ELISA Kit, BSF-2 ELISA Kit, CTL differentiation factor ELISA Kit, CDF ELISA Kit, Hybridoma growth factor ELISA Kit, Interferon beta-2 ELISA Kit, IFN-beta-2 ELISA Kit, IL6 ELISA Kit, IFNB2 ELISA Kit
Species: 
Human
Range: 
4.688-300pg/ml (1pg=110mIU)
Sensitivity: 
2.813pg/ml
Size Price
96T Inquiry
48T Inquiry
ETA of in-stock products: 2 Weeks
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Product Name
Human IL-6(Interleukin 6) ELISA Kit
Alias
Interleukin-6 ELISA Kit, IL-6 ELISA Kit, B-cell stimulatory factor 2 ELISA Kit, BSF-2 ELISA Kit, CTL differentiation factor ELISA Kit, CDF ELISA Kit, Hybridoma growth factor ELISA Kit, Interferon beta-2 ELISA Kit, IFN-beta-2 ELISA Kit, IL6 ELISA Kit, IFNB2 ELISA Kit
Catalogue No.
EH0201
Size
48T/96T
Species
Human
UniProt ID
P05231
Sample Type
Serum, Plasma, Cell Culture Supernatant, cell or tissue lysate, Other liquid samples
Detection Method
Sandwich ELISA, Double Antibody
Detection Wavelength
OD450
Reaction Duration
4 hours
Range
4.688-300pg/ml (1pg=110mIU)
Sensitivity
2.813pg/ml
Storage
2-8°C(Sealed), Don't cryopreserve.
Specificity
Specifically binds with IL-6 , no obvious cross reaction with other analogues.
ELISA Kit Components
Kit Components Item Size(48T) Size(96T) Storage Condition for Opened Kit
E001 ELISA Microplate(Dismountable) 8×6 8×12 Put the rest strips into a sealed foil bag with the desiccant. Stored for 1 month at 2-8°C; Stored for 6 month at -20°C
E002 Lyophilized Standard 1vial 2vial Put the rest standards into a desiccant bag. Stored for 1 month at 2-8°C; Stored for 6 month at -20°C
E003 Biotin-labeled Antibody(Concentrated, 100X) 60ul 120ul 2-8°C (Avoid Direct Light)
E034 HRP-Streptavidin Conjugate(SABC, 100X) 60ul 120ul
E024 TMB Substrate 5ml 10ml
E039 Sample Dilution Buffer 10ml 20ml 2-8°C
E040 Antibody Dilution Buffer 5ml 10ml
E049 SABC Dilution Buffer 5ml 10ml
E026 Stop Solution 5ml 10ml
E038 Wash Buffer(Concentrated, 25X) 15ml 30ml
E006 Plate Sealer 3 pieces 5 pieces  
E007 Product Description 1 copy 1 copy
Required Instruments and Reagents
  1. Microplate reader (wavelength: 450nm)
  2. 37°C incubator (CO2 incubator for cell culture is not recommenced.)
  3. Automated plate washer or multi-channel pipette/5ml pipettor (for manual washing purpose)
  4. Precision single (0.5-10μL, 5-50μL, 20-200μL, 200-1000μL) and multi-channel pipette with disposable tips(Calibration is required before use.)
  5. Sterile tubes and Eppendorf tubes with disposable tips
  6. Absorbent paper and loading slot
  7. Deionized or distilled water
Assay Procedure Summary
Elisa实验原理图
  • Step 1: Add 100ul standard or sample into each well, seal the plate and statically incubate for 90 minutes at 37°C.
  • Washing: Wash the plate twice without immersing.
  • Step 2: Add 100ul biotin-antibody working solution, seal the plate and statically incubate for 60 minutes at 37°C.
  • Washing: Wash the plate three times and immerse for 1min each time.
  • Step 3: Add 100ul HRP-Streptavidin Conjugate (SABC) working solution, seal the plate and statically incubate for 30 minutes at 37°C.
  • Washing: Wash the plate five times and immerse for 1min each time.
  • Step 4: Add 90ul TMB substrate solution, seal the plate and statically incubate for 10-20 minutes at 37°C. (Accurate TMB visualization control is required.)
  • Step 5: Add 50ul stop solution. Read at 450nm immediately and calculate.
Standard Curve

This product is detected by QC department and meets performance required in the manual. (Laboratory Humidity: 20%-60%; Temperature: 18°C -25°C; Equilibrate TMB substrate to 37°C before staining. After adding into the ELISA wells, incubate for 15min at 37°C in dark.)

Due to different assay environments and operations, assay data below and standard curve are provided for reference. Experimenters should establish standard curve according to their own assay.

STD.(pg/ml) OD-1 OD-2 Average
0 0.067 0.07 0.068
4.688 0.154 0.16 0.157
9.375 0.283 0.295 0.289
18.75 0.349 0.363 0.356
37.5 0.665 0.692 0.678
75 0.999 1.04 1.019
150 1.591 1.656 1.624
300 2.251 2.343 2.297
EH0201 Standard Curve Image
Recovery

Add a certain amount of IL-6 into the sample. Calculate the recovery by comparing the measured value with the expected amount of IL-6 in the sample.

Sample Type Recovery Range(%) Average(%)
serum(n=10) 87-105 99
EDTA plasma(n=10) 86-101 96
Heparin plasma(n=10) 92-100 95
Linearity

Dilute the sample with a certain amount of IL-6 at 1:2, 1:4 and 1:8 to get the recovery range.

Sample Type 1:2 1:4 1:8
serum(n=10) 91-104% 82-101% 81-98%
EDTA plasma(n=10) 87-104% 82-94% 89-100%
Heparin plasma(n=10) 90-102% 87-100% 84-93%
Precision(%)

Intra-assay Precision: samples with low, medium and high concentration are tested 20 times on the same plate.

Inter-assay Precision: samples with low, medium and high concentration are tested 20 times on three different plates.

Item Intra-assay Precision Inter-assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean (pg/ml) 9.64 37.26 153.2 9.17 37.94 147.6
Standard deviation 0.52 1.74 7.22 0.42 1.76 6.85
CV(%) 5.35 4.66 4.71 4.62 4.64 4.64
Stability

Perform the stability test for the sealed kit at 37°C and 2-8°C and get relevant data.

ELISA kit(n=5) 37°C for 1 month 2-8°C for 6 months
Average(%) 80 95-100
IF: 13.4
Journal:
Chemical Engineering Journal
Author:
State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, The Four
Sample:
supernatants
Cited Date:
2025-03-07
Product:
IF: 7.6
Journal:
Materials and Design
Author:
NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterial, & Institute of Regulatory Science for Medical Device, & National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
Sample:
supernatants
Cited Date:
2024-07-19
Product:
IF: 6.6
Journal:
Alimentary Pharmacology & Therapeutics
Author:
Department of Hepatology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Cited Date:
2024-08-23
Product:
IF: 5.6
Journal:
International Journal of Molecular Sciences
Author:
Laboratory of Physiology, Department for Sustainable Development and Ecological Transition, 13100 Vercelli, Italy
Sample:
SHSY-5Y cell
Cited Date:
2024-05-06
Product:
IF: 5.4
Journal:
International Journal of Molecular Medicine
Author:
College of Emergency Trauma, Hainan Medical University, Haikou, Hainan 571199, P.R. China
Species:
supernatants
Cited Date:
2024-06-14
Product:
IF: 5.4
Journal:
Pharmaceutics
Author:
Laboratory of Applied Microbiology, Department of Health Sciences (DISS), Center for Translational Research on Allergic and Autoimmune Diseases (CAAD), School of Medicine, Università del Piemonte Orientale (UPO), Corso Trieste 15/A, 28100 Novara, Italy
Cited Date:
2023-12-29
Product:
IF: 5.3
Journal:
Biochemical Pharmacology
Author:
Department of Dermatology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, The First Clinical Medical College of Shandong University of Traditional Chinese Medicine, Shandong Provincial Hospital of Traditional Chinese Medicine,
Cited Date:
2025-01-17
Product:
IF: 4.9
Journal:
International Journal of Molecular Sciences
Author:
Chair and Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, 02-097 Warsaw, Poland
Sample:
plasma
Cited Date:
2025-01-17
Product:
IF: 3.4
Journal:
Clinical Oral Investigations
Author:
Departament d'Estomatologia, Facultat de Medicina I Odontologia, Universitat de València, 46010, Valencia, Spain.
Sample:
human periodontal ligament stem cells (hPDLSCs)
Cited Date:
2024-03-15
Product:
IF: 3.3
Journal:
Microbial Pathogenesis
Author:
Department of Medical Biochemistry, Faculty of Medicine, Tokat Gaziosmanpasa University, Tokat, Türkiye.
Cited Date:
2025-01-03
Product:
IF: 3.2
Journal:
Medical Principles and Practice
Author:
Department of Gynecology and Obstetrics, Changchun University of Chinese Medicine Affiliated Hospital, Changchun 130000, Jilin, China
Species:
serum
Cited Date:
2024-06-14
Product:
IF: 2.5
Journal:
BMC Women's Health
Author:
Department of Obstetrics & Gynecology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, 518028, China
Cited Date:
2023-10-08
Product:
IF: 2.3
Journal:
Molecular and Cellular Probes
Author:
Department of Oral Medicine and Prosthodontics, Hebei Medical University Third Hospital, 050000, China.
Sample:
Gingival Crevicular Fluid(GCF)
Cited Date:
2025-02-21
Product:
IF: 0.9
Journal:
Nigerian Journal of Clinical Practice
Author:
Department of Restorative Dentistry, Faculty of Dentistry, Gaziantep University, ?ehitkamil, Gaziantep, Turkey
Cited Date:
2024-02-18
Product:
Journal:
International journal of health sciences
Author:
College of science, Anbar University
Sample:
serum
Cited Date:
2024-09-06
Product:
Journal:
Research Square
Author:
China National Tobacco Quality Supervision &Test Center
Cited Date:
2023-06-09
Product:
Journal:
Oral & Maxillofacial Pathology Journal
Author:
SKROLLS, Scientific Publishing Academy, Calicut, Kerala, India
Cited Date:
2023-07-28
Product:
Journal:
Cureus
Author:
Internal Medicine, All India Institute of Medical Sciences, Bhubaneswar, Bhubaneswar, IND
Sample:
serum
Cited Date:
2024-08-02
Product:
Journal:
Acta Microbiologica Bulgarica
Author:
Institute of Genetic Engineering and Biotechnology, University of Baghdad, Iraq
Sample:
serum
Cited Date:
2024-08-02
Product:
Journal:
Journal of Musculoskeletal and Neuronal Interactions
Author:
Cukurova University Faculty of Medicine, Department of Biophysics Adana, Turkiye.
Sample:
cartilage samples
Cited Date:
2024-08-02
Product:
Journal:
Pakistan Journal of Medicine and Dentistry
Author:
Molecular Medicine Department, Ziauddin University, Karachi
Sample:
supernatant
Cited Date:
2024-08-09
Product:
Journal:
Journal of Emergency Medicine, Trauma and Acute Care
Author:
Department of Periodontology, College of Dentistry, University of Baghdad, Baghdad, Iraq
Cited Date:
2025-01-10
Product:
Journal:
Research Square
Author:
Surendranath College
Sample:
salivary sample
Cited Date:
2025-01-10
Product:
Journal:
Journal of Medicine and Life
Author:
Department of Biology, College of Science, University of Anbar, Ramadi, Iraq
Cited Date:
2023-12-15
Product:
About FineTest® ELISA Kits
What’s the plate size in FineTest® ELISA Kits?

The ELISA plate follows the standard size of microplate: 127.64 mm x 85.60 mm x 14.22 mm(L x W x H).

How about the shelf life and stability of FineTest® ELISA Kits?

Valid for 12 months since the production date. For the shelf life of specific batch number, please check the label printed on the kit. Before delivery, all FineTest® ELISA Kits have been subject to strict quality test.

Which cloned antibodies for FineTest® ELISA Kits are used?

These information is proprietary. Please contact us to learn more about clonality (polyclonality or monoclonality) and host species.

Can I mix reagents from different batches of FineTest® ELISA Kits?

Not suggested. ELISA reagents are optimized for specific batch.

Can FineTest® ELISA Kits be used partially?

Yes. The ELISA plate is dismounted. Enough component volumes are offered by 96T ELISA kit, supporting two groups of standard curve.

How long can the diluted lyophilized standard be stored for continual use?

Used up within 12h.

Can standard curve be extended to any direction?

FineTest® can't support validation of standard concentration outside of standard curve. Ranges of standard curve have been validated among many batches and experimenters, showing stable and accurate performance. The lowest standard concentration is the minimized range for reliable detection results. Adding higher or lower concentration of standard may cause inconsistent signal or false positive.

Sample Issues
Why does detection for serum/plasma sample by FineTest® ELISA Kits require for 1/2 dilution?

Matrix components in serum/plasma can affect detection results. Blocking components in sample dilution buffer can decrease or remove the interference. The dilution can reduce the matrix difference between sample and standard to get better accuracy.

What’s the half-life of protein in serum/plasma/cell culture supernatant?

FineTest® can't determine the half-life of protein in the sample(e.g. serum, plasma or cell culture supernatant). Usually, it's suggested to detect prepared sample immediately or aliquot sample to refrigerate in a disposable container. Avoid freeze-thaw cycle to prevent protein degradation.

What's the expected concentration for particularly analyzing my sample?

Due to the specificity of each sample, it's hard to forecast and depend on sample preparation as well as analytical characteristics. Please contact us to get detection data for reference.

How many samples can FineTest® ELISA Kits detect?

It depends on whether duplicate assay for your sample is required. Such as, you can detect 80 samples without duplication or 40 samples.

Operational Issues
Why is sample loading conducted after equilibrating all kits’ components and samples to room temperature?

Temperature is the important factor for ELISA binding reaction. The reaction of samples at a consistent temperature requires for equilibrating all reagents to room temperature before the assay, including tested samples. Avoid the inaccurate ELISA assay results caused by temperature differences.

Why is duplicate assay suggested for ELISA assay?

To get more accurate assay results, it's strongly suggested to conduct duplicate assay for the standard and sample. Duplicate assay can calculate average value to ensure more accurate assay results and solve drift caused by misoperation during the assay. Calculation of CV evaluates experimental operation and precision of the ELISA kit.

How to get the standard curve with excellent linearity?

Follow the suggested method in the manual to store the standard. Before dissolving the standard, transient centrifugation is required to completely collect the powder. Confirm the fully dissolution and mixing of the standard(about 10min). Then, conduct steps of series dilution. Ensure the fully mixing and accurate pipetting in each step. Properly stop the staining. Choose suitable fitting equation to plot the standard curve.

Can ELISA plates be stacked together for incubation?

To keep the consistent environmental condition of all plates, stacking is not suggested during incubation.

Why is polypropylene tube used for standard dilution in some analyses?

Some proteins or analytes can bind with glass or polystyrene. However, they are not easy to bind with polypropylene tube.

When to stop ELISA reaction?

ELISA assay finally requires for enzyme-catalyzed substrate to complete the staining reaction. Stopping the reaction at the best time is the important factor for successful ELISA assay. When the blue complex appears after adding TMB substrate for 12min, read the O.D. absorbance at 620nm. The staining can be stopped, when the OD value of the darkest color at 620nm is between 0.8 - 0.9. The relevant OD value at 450nm for stopping the staining is between 2.0 - 2.5. If the OD value at 620nm is lower than 0.8, the staining duration can be properly extended.

Why is dual wavelength selected for reading in a microplate reader? What's the purpose of wavelength correction?

Dual wavelength for reading in ELISA assay mainly aims to remove non-specific background interference, and improve accuracy and reliability of the detection. FineTest® usually suggests to set the corrected wavelength as 570nm or 630nm in a microplate reader. The OD value may be higher when directly reading at 450nm. However, the accuracy is lower.

Why is 4 - pl curve fitting is required for generating standard curve?

FineTest® recommends to use ELISA curve fitting software and validate ELISA kit with 4 - pl curve fitting. 4 - pl curve fitting mainly aims to accurately describe the nonlinear dynamic characteristics of antigen - antibody binding. Thus, the quantitative accuracy of low or high concentration of sample is improved. Experimental errors are decreased. The reliability and reproducibility of assay results are ensured.

If sample OD value is higher than OD value of the highest point on the standard curve, what's the suggested solution?

Dilute the sample with dilution buffer and conduct the detection again. Ensure the detected value of the sample falls in the range of standard curve.

Publication Rewards
Are there any rewards to publish papers using FineTest® ELISA Kits?

If you published paper using FineTest® ELISA Kits, you will obtain US$150-US$550 coupon, please contact us for more details.