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本試劑盒只能用于科學研究,不得用于醫學診斷
人(Human)分泌型免疫球蛋白A(sIgA)
ELISA檢測試劑盒
使用說明書
檢測原理
試劑盒采用雙抗體一步夾心法酶聯免疫吸附試驗(ELISA)。往預先包被分泌型免疫球蛋白A(sIgA)抗體的包被微孔中,依次加入標本、標準品、HRP標記的檢測抗體,經過溫育并徹底洗滌。用底物TMB顯色,TMB在過氧化物酶的催化下轉化成藍色,并在酸的作用下轉化成最終的黃色。顏色的深淺和樣品中的分泌型免疫球蛋白A(sIgA)呈正相關。用酶標儀在450nm 波長下測定吸光度(OD 值),計算樣品濃度。
樣品收集、處理及保存方法
1. 血清:使用不含熱原和內毒素的試管,操作過程中避免任何細胞刺激,收集血液后,3000轉離心10分鐘將血清和紅細胞迅速小心地分離。
2. 血漿:EDTA、檸檬酸鹽或肝素抗凝。3000轉離心30分鐘取上清。
3. 細胞上清液:3000轉離心10分鐘去除顆粒和聚合物。
4. 組織勻漿:將組織加入適量生理鹽水搗碎。3000轉離心10分鐘取上清。
5. 保存:如果樣本收集后不及時檢測,請按一次用量分裝,凍存于-20℃,避免反復凍融,在室溫下解凍并確保樣品均勻地充分解凍。
自備物品
1. 酶標儀(450nm)
2. 高精度加樣器及槍頭:0.5-10uL、2-20uL、20-200uL、200-1000uL
3. 37℃恒溫箱
操作注意事項
1. 試劑盒保存在2-8℃,使用前室溫平衡20分鐘。從冰箱取出的濃縮洗滌液會有結晶,這屬于正常現象,水浴加熱使結晶完全溶解后再使用。
2. 實驗中不用的板條應立即放回自封袋中,密封(低溫干燥)保存。
3. 濃度為0的S0號標準品即可視為陰性對照或者空白;按照說明書操作時樣本已經稀釋5倍,最終結果乘以5才是樣本實際濃度。
4. 嚴格按照說明書中標明的時間、加液量及順序進行溫育操作。
5. 所有液體組分使用前充分搖勻。
試劑盒組成
名稱 | 96孔配置 | 48孔配置 | 備注 |
微孔酶標板 | 12孔×8條 | 12孔×4條 | 無 |
標準品 | 0.3mL*6管 | 0.3mL*6管 | 無 |
樣本稀釋液 | 6mL | 3mL | 無 |
檢測抗體-HRP | 10mL | 5mL | 無 |
20×洗滌緩沖液 | 25mL | 15mL | 按說明書進行稀釋 |
底物A | 6mL | 3mL | 無 |
底物B | 6mL | 3mL | 無 |
終止液 | 6mL | 3mL | 無 |
封板膜 | 2張 | 2張 | 無 |
說明書 | 1份 | 1份 | 無 |
自封袋 | 1個 | 1個 | 無 |
Name | 96 determinations | 48 determinations |
Microelisa stripplate | 12*8strips | 12*4strips |
Standard | 0.3ml*6tubes | 0.3ml*6tubes |
Sample Diluent | 6.0ml | 3.0ml |
HRP-Conjugate reagent | 10.0ml | 5.0ml |
20X Wash solution | 25ml | 15ml |
Chromogen Solution A | 6.0ml | 3.0ml |
Chromogen Solution B | 6.0ml | 3.0ml |
Stop Solution | 6.0ml | 3.0ml |
Closure plate membrane | 2 | 2 |
User manual | 1 | 1 |
Sealed bags | 1 | 1 |
Note: Standard (S0 → S5) concentration was followed by 0,1.25,2.5,5,10,20 μg/mL.
Reagent preparation
20×wash solution:Dilute with Distilled or deionized water 1:20.
Assay procedure
1. Prepare all reagents before starting assay procedure. It is recommended that all Standards and Samples be added in duplicate to the Microelisa Stripplate.
2. Add standard: Set Standard wells, testing sample wells. Add standard 50μl to standard well.
3. Add Sample: Add testing sample 10μl then add Sample Diluent 40μl to testing sample well; Blank well doesn’t add anyting.
4. Add 100μl of HRP-conjugate reagent to each well, cover with an adhesive strip and incubate for 60 minutes at 37°C.
5. Aspirate each well and wash, repeating the process four times for a total of five washes. Wash by filling each well with Wash Solution (400μl) using a squirt bottle, manifold dispenser or autowasher. Complete removal of liquid at each step is essential to good performance. After the last wash, remove any remaining Wash Solution by aspirating or decanting. Invert the plate and blot it against clean paper towels.
6. Add chromogen solution A 50μl and chromogen solution B 50μl to each well. Gently mix and incubate for 15 minutes at 37°C. Protect from light.
7. Add 50μl Stop Solution to each well. The color in the wells should change from blue to yellow. If the color in the wells is green or the color change does not
appear uniform, gently tap the plate to ensure thorough mixing.
8. Read the Optical Density (O.D.) at 450 nm using a microtiter plate reader within 15 minutes.
Calculation of results
1. This standard curve is used to determine the amount in an unknown sample. The standard curve is generated by plotting the average O.D. (450 nm) obtained for each of the six standard concentrations on the vertical (Y) axis versus the corresponding concentration on the horizontal (X) axis.
2. First, calculate the mean O.D. value for each standard and sample. All O.D. values, are subtracted by the mean value of the zero standard before result interpretation. Construct the standard curve using graph paper or statistical software.
3. To determine the amount in each sample, first locate the O.D. value on the Y-axis and extend a horizontal line to the standard curve. At the point of intersection, draw a vertical line to the X-axis and read the corresponding concentration.
4. Any variation in operator, pipetting and washing technique, incubation time or temperature, and kit age can cause variation in result. Each user should obtain their own standard curve.
5. The sensitivity by this assay is 10 μg/mL
6. Standard curve
Storage: 2-8℃.
validity: six months.
FOR RESEARCH USE ONLY; NOT FOR THERAPEUTIC OR DIAGNOSTIC APPLICATIONS! PLEASE READ THROUGH ENTIRE PROCEDURE BEFORE BEGINNING!