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Human Tumor Necrosis Factor Alpha (TNFa) ELISA Kit

SKU: orb775055
ELISA 试剂盒促销
特色特色

描述

The Human Tumor Necrosis Factor Alpha (TNFa) ELISA Kit uses a sandwich enzyme immunoassay to quantify Tumor Necrosis Factor Alpha (TNFa) in human serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids. The kit has a detection range of 15.63-1000 pg/mL and a sensitivity of 6.4 pg/mL.

研究领域

Cancer Biology; Immunology & Inflammation

图片与验证

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已测应用ELISA
应用说明
standard: 1000 pg/mL. 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 TNFa. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human TNFa. 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 TNFa, 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 TNFa in the samples is then determined by comparing the OD of the samples to the standard curve

关键属性

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反应性Human
样本类型serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
检测类型Sandwich
检测时间3.5h
范围15.63-1000 pg/mL
灵敏度6.4 pg/mL
浓度1000 pg/mL

步骤与表现

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Assay Principle
The kit is based on a sandwich enzyme immunoassay principle. The microtiter plate is pre-coated with a capture antibody specific to the target analyte. Standards or samples are added to the wells, followed by a biotin-conjugated detection antibody specific for the analyte. Avidin conjugated to horseradish peroxidase (HRP) is then added and incubated. After addition of the TMB substrate, color develops only in wells containing the analyte bound to the detection antibody and HRP–avidin complex. The reaction is stopped with an acidic solution, and absorbance is measured at 450 nm ± 10 nm. The analyte concentration in the samples is determined by comparison with a standard curve.
Kit Components
1. ELISA Microplate
2. Standards
3. Detection Antibody
4. HRP-Streptavidin Conjugate
5. TMB Substrate
6. Dilution buffers
7. Stop Solution
8. Wash Buffer
9. Plate Sealers
10. Manual
Reagent Preparation
1. Wash Buffer: Prepare the 1X Wash Buffer using distilled water according to the manual.
2. Standard: Perform gradient dilution according to the instructions in the manual.
3. Other Concentrated Reagents: Dilute the concentrated reagents using the Dilution Buffers provided in the kit to 1 X working solutions as instructed in the manual. Always use a clean pipette tip for each different solution.
Assay Procedure
This procedure is for reference only.

1. After the kit equilibrates to room temperature, add standards or samples to each well and incubate.
2. Discard liquid, add wash buffer to each well, wash the plate three times, and blot dry on clean absorbent paper.
3. Add biotinylated antibody working solution to each well and incubate.
4. Discard liquid, add wash buffer to each well, wash the plate three times, and blot dry on clean absorbent paper.
5. Add streptavidin-HRP working solution to each well and incubate._x000b_6. Discard liquid, add wash buffer to each well, wash the plate five times, and blot dry on clean absorbent paper.
7. Add TMB substrate solution to each well and incubate in the dark.
8. Add stop solution to each well, mix thoroughly, and immediately read OD at 450 nm.
Materials Required
1. Microplate readers
2. Centrifuge
3. Incubator
4. Automated plate washer
5. Single-channel or multi-channel high-precision pipettes
6. Disposable pipette tips
7. Sterile tubes
8. Eppendorf tubes
9. Absorbent paper
10. Loading slots
Precision
Intra-assay Precision (Precision within an assay): CV% < 8%
Intra-assay precision was evaluated by testing multiple replicates of samples within the same plate.

Inter-assay Precision (precision between assays): CV% < 10%
Inter-assay precision was evaluated by testing samples across different plates.
Calculation of Results
1. Average the duplicate readings for each Standard, Control, and Sample, and subtract the mean optical density of the zero Standard.
2. Construct a standard curve by plotting the target concentration on the y-axis against absorbance on the x-axis and draw a curve through the data points.
3. Determine the sample concentration by substituting the OD450 value into the standard curve. For diluted samples, multiply the calculated value by the corresponding dilution factor.
Curve Fitting Softwares
1. Curve Expert
2. Thermo SkanIt RE
3. SciDAVis
4. LabPlot
5. ……

储存与操作

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储存请参阅操作手册中的储存说明
有效期Please enquire.
免责声明For research use only

别名

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TNF Alpha, DIF ELISA Kit, TNF-A ELISA Kit, TNFSF2 ELISA Kit, Cachectin ELISA Kit, Tumor Necrosis Factor Ligand Superfamily Member 2 ELISA Kit

相似产品

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质量保证

质量保证

Explore bioreagents carefree to elevate your research. All our products are rigorously tested for performance. If a product does not perform as described on its datasheet, our scientific support team will provide expert troubleshooting, a prompt replacement, or a refund. For full details, please see our 条款与条件和选购指南.

常用数据库链接

UniProt
P01375

UniProt 详情

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暂无 UniProt 数据

实验方案信息

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按种属筛选

Bożena Kowalczyk et al. N-Methylation of Legionaminic Acid in Legionella pneumophila Serogroup 1 LPS Affects Cell Surface Properties, Intracellular Growth, and Cytokine Response Pathogens ., (2026)

PubMed: 42347227

应用

ELISA

反应性

Human

Neşe Ayşit et al. N-Methyl-D-Aspartate Receptor (NMDAR) Antibodies Induce Diverse Calcium Activity Patterns on Cultured Astrocytes and Astrocyte–Neuron Cocultures Acta Neurologica, (2025)

PubMed:

应用

ELISA

反应性

Human

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48 T
¥ 4,290.00
96 T
¥ 6,110.00
发货Usually dispatched within 5-10 working days
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