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技术文章
Human Retinol binding protein（RBP ）ELISA Kit
点击次数：461 发布时间：2012/7/30 17:35:05
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Human Retinol binding protein（RBP ）ELISA Kit
| FOR RESEARCH USE ONLY |
Assay range：80μg/L -2000μg/L 96determinations
Purpose
This kit allows for the determination ofRBPconcentrations in Human serum, cellculture supernates ａnd other biological fluids
Principle of the assay
The kit assay Human RBP level in the sample，use Purified Human RBPantibody to coat microtiter plate wells, make solid-phase antibody, then addRBPto wells,Combined antibody which With HRP labeled goat anti-Human become antibody - antigen - enzyme-antibody complex, after washing Completely,Add TMB substrate solution,TMB substrate becomes blue color At HRP enzyme-catalyzed,reaction is terminated by the addition of a sulphuric acid solution ａnd the color change is measured spectrophotometrically at a wavelength of 450 nm. The concentration ofHuman RBPin the samples is then determined by comparing the O.D. of the samples to the standard curve.
Materials provided with the kit
| 1 | wash solution | 20ml×1bottle | 7 | Stopp Solution | 6ml×1 bottle |
| 2 | HRP-Conjugate reagent | 6ml×1 bottle | 8 | Standard（4000μg/L） | 0.5ml×1 bottle |
| 3 | Microelisa stripplate | 12well×8strips | 9 | Standard diluent | 1.5ml×1bottle |
| 4 | Sample diluent | 6ml×1 bottle | 10 | Instruction | 1 |
| 5 | Chromogen Solution A | 6ml×1 bottle | 11 | Closure plate membrane | 2 |
| 6 | Chromogen Solution B | 6ml×1 bottle | 12 | Sealed bags | 1 |
Human Retinol binding protein（RBP ）ELISA Kit
Specimen requirements
1. extractas soon as possible after Specimen collection,and according to the relevant literature, ａnd should be experiment as soon as possible after the extraction. If it can’t, specimen can be kept in -20 ℃ to preserve, Avoid repeated freeze-thaw cycles.
2. Can’t detect the sample which contain NaN3, because NaN3 inhibits HRP active.
Assay procedure
1. Dilute ａnd add sample:Dilute Original density Standard as follow table:
| 2000μg/L | 5 Standard | 150μl Original density Standard+150μl Standard diluent |
| 1000μg/L | 4 Standard | 150μl 5 Standard+150μl Standard diluent |
| 500μg/L | 3 Standard | 150μl 4 Standard+150μl Standard diluent |
| 250μg/L | 2 Standard | 150μl 3 Standard +150μl Standard diluent |
| 125μg/L | 1 Standard | 150μl 2 Standard +150μl Standard diluent |
2.add sample：Set blank wells separately （blank comparison wells don’t add sample ａnd HRP-Conjugate reagent, other each step operation is same）. testing sample well. add Sample dilution 40μl to testing sample well, then add testing sample 10μl （sample final dilution is 5-fold）, add sample to wells , don’t touch the well wall as far as possible, and Gently mix.
3.Incubate: After closing plate with Closure plate membrane ,incubate for 30 min at 37℃.
4.Configurate liquid: 30-fold wash solution diluted 30-fold （or 20-fold） with distilled water ａnd reserve.
5.washing：Uncover Closure plate membrane, discardLiquid, dry by swing, add washing buffer to every well, still for 30s then drain,repeat 5 times, dry by pat.
6.add enzyme：Add HRP-Conjugate reagent 50μl to each well, except blank well.
7.incubate：Operation with 3.
8.washing：Operation with 5.
9.color：Add Chromogen Solution A 50ul and Chromogen Solution B to each well, evade the light preservation for 15 min at 37℃
10.Stop the reaction：Add Stop Solution50μl to each well, Stop the reaction（the blue color change to yellow color）.
11.assay：take blank well as zero , Read absorbance at 450nm after Adding Stop Solution ａnd within 15min.
Steps description
| Standard, Sample diluent |
| Add Standard, Sample diluent, incubate for 30 min at 37℃. |
| Wash 5 time,Add HRP-Conjugate reagent, incubate for 30 min at 37℃. |
| Wash 5 times,Add Chromogen Solution A ａnd B, incubate for 30 min at 37℃. |
| Add Stopp Solution |
| Read absorbance at 450nm within 15 min |
| calculate |
Calculate
Take the standard density as the horizontal, the OD value for the vertical ,draw the standard curve on graph paper, Find out the corresponding density according to the sample OD value by the Sample curve, multiplied by the dilution multiple, or calculate the straight line regression equation of the standard curve with the standard density ａnd the OD value ,with the sample OD value in the equation, calculate the sample density, multiplied by the dilution factor, the result is the sample actual density.
Important notes
1. The kit takes out from the refrigeration environment should be balanced 15-30 minutes in the room temperature, ELISA plates coated if has not use up after opened, the plate should be stored in Sealed bag.
2. washing buffer will Crystallization separation, it can be heated the water helps dissolve when dilute . Washing does not affect the result.
3. add Sample with sampler Each step, And proofread its accuracy frequently, avoids the experimental error. add sample within 5 min, if the number of sample is much , recommend to use Volley .
4. if the testing material content is excessively higher （The sample OD is bigger than the first standard well ）,please dilute Sample （n-fold）, Please diluenteand multiplied by the dilution factor.（×n×5）.
5. Closure plate membrane only limits the disposable use, to avoid cross-contamination.
6. The substrate evade the light preservation.
7. Please according to use instruction strictly, The test result determination must take the microtiter plate reader as a standard.
8. All samples, washing buffer ａnd each kind of reject should according to infective material process.
9. Do not mix reagents with those from other lots.
Storage ａnd validity
1．Storage： 2-8℃.
2．validity： six months.
Human Retinol binding protein（RBP ）ELISA Kit
原创作者：上海广锐生物科技有限公司
