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[求助]
液質(zhì)聯(lián)用外標(biāo)法相關(guān)問題
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| 請問各位大蝦,小弟要做藥物的液質(zhì)聯(lián)用檢測,看了很多文獻(xiàn),都是要用到內(nèi)標(biāo)的,但是導(dǎo)師說內(nèi)標(biāo)貴,不好買,說用外標(biāo)法做,我犯糊涂了,液質(zhì)聯(lián)用如果用外標(biāo)法的話需要注意什么么?怎么樣才能保證外標(biāo)法的合理呢??求賜教啊~~ |

木蟲 (小有名氣)
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用外標(biāo)法的話要盡可能通過前處理減弱基質(zhì)效應(yīng)。確定方法后,通過實(shí)際樣品所得的標(biāo)曲與標(biāo)準(zhǔn)品所得標(biāo)曲的斜率比值得到矯正后的基質(zhì)效應(yīng)的參數(shù),實(shí)際樣品測定的含量需要這個矯正參數(shù)轉(zhuǎn)換成基質(zhì)中該物質(zhì)的實(shí)際含量 Calibration curve slope ratios (matrix matched to pure solvent) were calculated to determine the matrix effects resulting in signal enhancement suppression Signal enhancement occurs if the ratio of the slopes is larger than 100%. If the ratio isless than 100%, it is the indication of signal suppression. According to previous report, a strong matrix effect occurred when the ratios were below 50% or above 150%, and a medium matrix effect would be between 50% and 80% or between 120% and 150%. A ratio between 80% and 120% was considered as no matrix effect, because this variation is close to the repeatable values. 這類分析方法文獻(xiàn)中都用提到,LZ可以看下分析類的這方面文獻(xiàn) |
新蟲 (小有名氣)
木蟲 (小有名氣)
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