从分析物到色谱图：如何选择“用于HPLC衍生化”的试剂
高效液相色谱（HPLC）根据溶液中化合物与填充色谱柱之间相互作用的强弱来实现分离；而衍生化是将分析物有目的地化学转化为一种结构密切相关、但更易于分析的衍生物——其典型目的包括引入可进行 ...
阿拉丁试剂的规格、级别和纯度
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阿拉丁试剂的规格、级别和纯度
探索阿拉丁生物化学品和试剂的详细规格、分级标准和纯度水平。确保科学研究的可靠性和性能。
392 篇文章
A Practical Guide to IR Spectroscopy-Grade Reagents
Ordinary solvents and matrices often contain trace water, carbonyls, alcohols, or aromatics that show bands in the mid-IR and mask your analyte. “IR spectroscopy grade” (often labeled for IR spectroscopy, spectroscopic grade (IR)) refers to reagents—primarily solvents, sample matrices, and ...
理解“for GC-MS”：它是什么，以及为何会影响结果
气相色谱（GC）：在惰性气体的携带下，样品通过涂覆固定相的色谱柱，挥发性或半挥发性化合物因与固定相相互作用不同而在不同时间洗脱。GC速度快、鲁棒性强，适用于能在不分解情况下汽化的分析物。
Understanding “for GC-MS”: What It Means and Why It Matters in Your Results
Gas chromatography (GC) separates volatile or semi-volatile compounds as a sample is carried by an inert gas through a coated column; compounds elute at different times based on interactions with the stationary phase. It’s fast, robust, and ideal for analytes that can be vaporized without ...
红外光谱级试剂实用指南
常规溶剂和基质往往含有痕量水分、羰基化合物、醇类或芳香族成分，这些物质会在中红外区域产生吸收带，从而掩盖目标分析物的信号。所谓“红外光谱级”（标签常见for IR spectroscopy、spectroscopic grade ...
Standard for GC: A Practical Guide
“Standard for GC” (often shown as for GC, GC grade, or analytical standard, for GC) is a supplier-defined quality grade for neat chemicals or ready-to-use solutions that are intended for gas chromatography workflows. The grade ensures very low background on common GC detectors (FID, ECD, MS), ...
Standard for GC：一份实用指南
Standard for GC”（常见标注：for GC、GC grade 或 analytical standard, for ...
试剂标签上的“Recrystallized（再结晶）”是什么意思？— 实用指南
再结晶（recrystallization）是一种用于固体化学品的纯化工艺：将含杂固体溶解于加热的溶剂（或混合溶剂）中，去除不溶物，然后冷却，使较纯的晶体析出，而可溶性杂质留在母液中；最后收集并干燥晶体。在实验室实践中，对于不分解的有机物，再结晶是提高纯度并缩窄熔程的最可靠方法之一。 ...
What Does “Recrystallized” Mean on a Reagent Label? A Practical Guide
Recrystallization is a purification process for solid chemicals: dissolve the impure solid in a hot solvent (or solvent mix), remove insoluble matter, then let it cool so pure crystals form while soluble impurities stay in solution. The solid is collected and dried. In lab practice, it’s one of ...
危险品化学品经营许可证（带存储）