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今日新聞                 日期：2022/8/15

在日常實(shí)驗(yàn)中我們經(jīng)常遇到的一個(gè)問題，就是氣相色譜儀定量時(shí)重現(xiàn)性不好，造成該問題的原因比較多，有時(shí)我們有的檢測(cè)人員不知該如何入手，在這里本人根據(jù)自己的經(jīng)驗(yàn)，以氣相色譜配SPL進(jìn)樣口 FID檢測(cè)器為例，舉出一些可能的原因及處理辦法，供大家分享并討論指正。 

一旦出現(xiàn)樣品峰面積重現(xiàn)性不好，我們首先應(yīng)該從簡(jiǎn)單的基本的入手，排除一些由于自身的疏忽而造成該問題的可能性。比如樣品的問題，標(biāo)樣的濃度是否改變（因配置不準(zhǔn)確或者揮發(fā)等原因造成改變），或者因?yàn)樯V條件的改變而造成的（改變了色譜分析條件就沒有“重現(xiàn)”可言），如分流比、柱溫等的前后不一致。 檢查完了這些基本的地方，然后下一步要做的就是檢查儀器的一些情況了。

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英文翻譯：

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In routine experiments we often encounter a problem , is when the gas chromatograph quantitative reproducibility is bad, the cause of the problem is more , sometimes we have test researchers don^,t know how to start, here I have according to your own experience , by gas chromatography with SPL injection port FID detector, for example ,give some possible causes and treatment method , for everbody to share and win The theory of the correction.

Once the reproducibility of sample peak area is not good ,we should first start from the simple basic ,ａnd exclude the possibility that the problem is caused by our own negligence.

For example, the problem of the sample , whether the concentration of the standard sample is chaged (due to inaccurate configuration or volatile and other reasons), or because of the ghange of the chromatographic conditions (changed chromatographic analysis conditions absolutely no^'reproducible^"at all), such as split ratio , column temperature before and after the inconsistency. Having checked these basic points,the next thing to do is to check some conditions of the instrument.