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INDUSTRY TRENDS
氣相色譜:揭示物質世界的精密之眼
2025-08-26
在現代分析科學的廣闊領域中,氣相色譜(Gas Chromatography, GC)以其卓越的分離能力和高靈敏度,被譽為“揭示物質世界的精密之眼”。自20世紀50年代問世以來,這一技術已廣泛應用于環境監測、食品安全、藥物研發、石油化工、刑事偵查和生命科學等多個關鍵領域,成為科研人員和質量控制工程師不可或缺的分析利器。氣相色譜的核心原理基于混合物中各組分在固定相與流動相之間的分配差異。待測樣品...
泵將溶劑瓶中的流動相吸干色譜柱還能使用嗎?
2025-08-20
不少做色譜分離試驗的人遇到過這樣的情形:不慎未及時補充流動相,泵將溶劑瓶中的流動相吸干了,HPLC系統由此而停止工作了。如此情況是否會損壞色譜柱?泵是否已將色譜柱中所有流動相都排干了?色譜柱還能使用嗎? 事實上,如果泵將溶劑瓶中的流動相吸干,并不會造成色譜柱的損壞。即使泵中充滿了空氣,泵也不會將空氣排入色譜柱。因為泵只能輸送液體,而不能輸送空氣。 相比之下,另一個更可能發生的情況是忘...
氣相色譜:精準分離的科學之眼
2025-08-13
在現代分析化學領域,氣相色譜(Gas Chromatography, 簡稱GC)作為一種高效、靈敏的分離與檢測技術,被譽為“科學之眼”,廣泛應用于環境監測、食品安全、藥物分析、石油化工、 forensic science(法醫學)等多個重要領域,是科研與質量控制中不可或缺的核心工具。氣相色譜的基本原理是利用不同物質在固定相(色譜柱內的涂層)與流動相(惰性氣體,如氮氣、氦氣或氫氣)之間的分配系...
液相色譜:精準分離的科學之眼
2025-08-06
在現代分析科學領域,面對復雜樣品中微量甚至痕量成分的檢測需求,傳統的分析方法往往難以勝任。液相色譜(Liquid Chromatography, LC)作為一種高效、靈敏的分離技術,已成為化學、生物、醫藥、環境、食品等眾多領域的核心分析工具,被譽為揭示物質組成的“科學之眼”。液相色譜的基本原理是利用混合物中各組分在固定相(色譜柱填料)與流動相(液體溶劑)之間不同的分配行為,實現逐一分離。當樣...
液相色譜:現代分析化學的“分離之眼”
2025-07-30
在現代科學研究、藥物開發、食品安全、環境監測和臨床診斷等領域,對復雜混合物中微量成分的精確分離與定量分析至關重要。液相色譜(Liquid Chromatography, 簡稱LC)作為一種高效、靈敏的分離分析技術,已成為實驗室中不可或缺的核心工具,被譽為現代分析化學的“分離之眼”。液相色譜:現代分析化學的“分離之眼”液相色譜的基本原理是利用不同物質在固定相(色譜柱填料)和流動相(液體溶劑)之...
光衍生:推動分析檢測技術邁向高靈敏度的新路徑
2025-07-23
在現代分析化學領域,許多化合物由于缺乏特定的光學響應特性,難以通過常規的紫外-可見光譜或熒光檢測方法進行高靈敏度檢測。為此,科學家們開發出一種關鍵技術——光衍生技術(Optical Derivatization),通過化學反應將目標化合物轉化為具有更強光吸收或熒光發射能力的衍生產物,從而顯著提高檢測靈敏度和選擇性。這項技術廣泛應用于高效液相色譜(HPLC)、氣相色譜(GC)及質譜(MS)等分...
天津衍生試劑:推動精準檢測的技術引擎
2025-07-16
在現代分析化學、生物醫學、環境監測及食品安全等領域,許多化合物由于缺乏特定的光譜響應特性或穩定性差,難以通過常規儀器進行高靈敏度、高選擇性的檢測。為解決這一難題,衍生試劑應運而生,并成為提升檢測精度和擴展應用范圍的重要工具。衍生試劑是一類能夠與目標化合物發生化學反應,生成具有更強紫外吸收、熒光信號或質譜響應特性的衍生產物的化學試劑。它們廣泛應用于高效液相色譜(HPLC)、氣相色譜(GC)、質...
衍生試劑:提升分析檢測精度的關鍵工具
2025-07-10
在現代化學分析、生物檢測和環境監測等領域,許多化合物由于缺乏特定的光譜響應特性或穩定性差,難以直接通過常規儀器進行高靈敏度檢測。為此,科學家們開發出一種關鍵技術——柱后衍生技術,而其中的核心材料——衍生試劑,則成為提高檢測靈敏度和選擇性的關鍵工具。衍生試劑是一類能夠與目標化合物發生化學反應,生成具有更強光學、電化學或質譜響應特性的衍生產物的化學試劑。它們廣泛應用于高效液相色譜(HPLC)、氣...
柱后衍生:提升氨基酸分析精度的關鍵技術
2025-07-02
在現代生物化學、食品檢測、醫藥研發和環境監測等領域,氨基酸作為構成蛋白質的基本單位,其精準定量分析具有重要意義。而在眾多氨基酸分析方法中,柱后衍生技術(Post-column Derivatization)因其高靈敏度、高選擇性和穩定性,成為高效液相色譜法(HPLC)中廣泛采用的一種關鍵分析手段。柱后衍生是一種在色譜分離完成后,對目標化合物進行在線化學反應以增強其可檢測性的技術。在氨基酸分析...
氨基酸分析儀:解析生命密碼的精密之眼
2025-06-25
氨基酸是構成蛋白質的基本單位,廣泛參與生物體內的代謝、調節和免疫等生理過程。在科研、醫藥、食品、農業等領域,準確測定樣品中氨基酸的種類與含量,對于營養評估、疾病診斷、新藥研發及食品安全控制具有重要意義。氨基酸分析儀作為一種高精度、自動化的檢測設備,正成為現代實驗室不可或缺的重要工具。氨基酸分析儀是一種專門用于分離、定量分析各種游離氨基酸的專用儀器,其核心原理基于離子交換色譜法或高效液相色譜法...
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