Biogenic amines during the fermentation of natto was detected by HPLC, using precolumn derivatization with DNS-Cl.
研究通过丹磺酰氯柱前衍生，用HPLC对纳豆发酵过程中的生物胺进行检测。
A method for the enantioseparation of 2, 5-hexanediol by capillary gas chromatography with precolumn derivatization was proposed.
建立柱前衍生化-毛细管气相色谱法分离2,5 -己二醇对映体的方法。
Objective: to establish precolumn derivation HPLC method to determine the monosaccharides in Heterosmilax japonica polysaccharide.
目的：建立柱前衍生HPLC法测定白土茯苓多糖中单糖的组成。
Objective: To establish the double HPLC fingerprints of water-soluble composition and amino acids precolumn derivative reagent of 13 batches of Isatidis Radix micropower.
目的：建立13批板蓝根超微粉体水溶性成分和氨基酸柱前衍生化双重HPLC指纹图谱。
When the aqueous solvent (solvent a) is cleaned up in terms of an on-line precolumn, the purity of the organic solvent (solvent b) can be tested according to the chromatogram of the blank gradient.
当含水溶剂通过预柱在线净化后，根据空白梯度色谱图可测试有机溶剂的纯度。
When the aqueous solvent (solvent a) is cleaned up in terms of an on-line precolumn, the purity of the organic solvent (solvent b) can be tested according to the chromatogram of the blank gradient.
当含水溶剂通过预柱在线净化后，根据空白梯度色谱图可测试有机溶剂的纯度。
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