傷寒抗原(St-Ag)ELISA檢測試劑盒檢測的原理:試劑盒采用雙抗體一步夾心法酶聯(lián)免疫吸附試驗(ELISA)。 報價,檢測原理,使用說明書。廠家現(xiàn)貨直銷,齊一生物科技專業(yè)生產(chǎn)研發(fā)經(jīng)營穩(wěn)定、優(yōu)質(zhì)、高效、實用的ELISA試劑盒,公司提供ELISA試劑盒免費代測,ELISA試劑盒批發(fā)價零售,ELISA試劑盒專業(yè)生產(chǎn)廠家,ELISA試劑盒進口品牌!全國: 咨詢免費
傷寒抗原(St-Ag)ELISA檢測試劑盒操作步驟:
1.包被過程(注意設置空白對照,陰性對照):
將所用抗原用包被稀釋液稀釋到適當濃度(一般所需抗原包被量為每孔20-200μg),每孔抗原加入100μl,置37℃,4h,或4℃,24h;棄去孔中液體.(為避免蒸發(fā),板上應加蓋或?qū)迤椒旁诘撞坑袧窦啿嫉慕饘贊窈兄?
2.封閉酶標反應孔:
5%小牛血清置37℃封閉40min.封閉時將封閉液加滿各反應孔,并去除各孔中的氣泡,封閉結束后用洗滌液滿孔洗滌3遍,每遍3min.
洗滌方法:吸干孔內(nèi)反應液,將洗滌液注滿板孔,放置2min略作搖動,吸干孔內(nèi)液,傾去液體后在吸水紙上拍干
洗滌次數(shù)3次
3.加入待檢測樣品(建立合適的濃度梯度):
檢測時一般采用1:50-1:400的稀釋度,應采用較大稀釋體積進行,一般保證樣品吸取量>20μl.
將稀釋好的樣品加入酶標反應孔中,每樣品少加雙孔,每孔100μl,置于37℃,40-60min.用洗滌液滿孔洗滌3遍,每遍3min.
4.加入酶標抗體:
酶標抗體:根據(jù)酶結合物提供商提供的參考工作稀釋度進行.37℃,30-60min之間.短于30min往往結果不穩(wěn)定.每孔加100μl.洗滌同前.
5.加入底物液(現(xiàn)用現(xiàn)配):
*TMB-過氧化氫尿素溶液,OPD-過氧化氫底物液系統(tǒng)次之.
底物加入量:每孔100μl,置37℃避光放置3-5分鐘,加入終止液顯色.
6.終止反應:
每孔加入終止液50μl終止反應,于20min內(nèi)測定實驗結果.
7.結果判斷:
OPD顯色后采用492nm波長,TMB反應產(chǎn)物檢測需要450nm波長.檢測時一定要首先進行空白孔系統(tǒng)調(diào)零.用測定標本孔的吸收值與一組陰性標本測定孔平均值的比值(P/N)表示,當P/N大于2時作為抗體的效價.(數(shù)值的大小依具體檢測要求而定.)
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