After dilution, the NMP is separated by hydrophobic high performance liquid chromatography (HPLC) and detected by positive electro-spray tandem mass spectrometry (MS/MS). Quantitation is by...

2022年7月15日 · NMP was quantified by HPLC (Agilent Scientific Instruments, model 1260 Infinity II) using a PDA detector at a wavelength of 214 nm. HPLC was operated in an isocratic mode at 25 ℃ temperature with a mobile phase at a flow rate of 0.7 mL/min. The mobile phase was composed of 5% acetonitrile and 95% Milli-Q water (Zolfaghari et al., 2011). The ...

1-Methyl-2-pyrrolidinone (NMP) has been used as a solvent to study the dispersion ability of acrylate polymers for graphene. It has also been used for the fabrication of working electrodes for electrochemical measurements in a study.

2005年5月27日 · I would like to determine NMP in pharmaceutical product by HPLC. The method must be selective to solvents (ethanol, dymethylacetamide, aceton, isopropylacetate and acetic acid). Unfortunately NMP coelutes with all solvents mentioned above. (We tried also GC method, peak for standard NMP was excellent however NMP peak in the sample has bad tailing).

2003年11月24日 · A new, simple and rapid gas chromatographic method was developed for the determination of N-methylpyrrolidine (NMP) in cefepime and its preparation. NMP was extracted with chloroform from cefepime and its preparation. An HP-1 column was maintained at 100 °C. Both the injector and the FI detector were set 250 °C. Pyridine was used as an ...

nmp作为浆料的主要液体载体，以稳定的厚度均匀涂 敷在金属基材上，要求和金属基材有非常好的润湿性 和流动性。在涂布烘烤阶段：湿膜在烘箱中匀速运行， 溶剂有规律性挥发，nmp承担造孔功能，nmp以稳定 的速度从湿膜中挥发，形成孔径均匀，分布均匀的多

2024年9月25日 · 纤维血液透析器中nmp，采用hplc方法进行定性定量测定的分析。 该方法具有简单快速、重现 性好、回收率高、精密度好、干扰少、定性定量准确、结果可靠等优点，可用于血液透析器

2017年2月25日 · 以减压馏分油为空白加入 nmp，配制一定浓度的加标样品，每个样品重复测定两次，取平均值，计算回收率。 按照优化后的方法绘制标准曲线，样品中 NMP 含量在 0.10%以下时，按原方法称 10g 样品加标回收率均在 95%以上，回收率良好，准确度高。

2011年1月20日 · HPLC测定润滑油中的NMP 【摘要】：建立了一种分析NMP的高效液相色谱方法,色谱条件:色谱柱为VARIAN C18(250×4.6 mm),流动相为m(甲醇)∶m(水)=40∶60,流速1 mL/min,柱温为室温,检测波长210 nm。方法线性范围为0.000 1%~0.01%,r=0.999 6,检出限为0.002μg,RSD为0.10%,加标回收率为98.6%~100.7%。

笔 者 建 立 了 HPLC–MS–MS 法 测 定 塑 料 中NMP 的方法，该法为塑料中有毒有害物质的监控提供简便、快速的检测技术。 实验用水为屈臣氏超纯水。 准确称取 10 mg NMP 标准品，用乙腈定容于100 mL 棕色容量瓶中，配制成 0.1 mg／mL 的标准储备液（于 4℃下可保存 3 个月）。 取一定体积的标准储备液，用乙腈稀释并定容，配制成质量浓度为1.0 μg／mL 的标准中间液，并根据需要稀释成适当浓度的标准工作溶液，于 4℃下保存。 2.5 mm×2.5 mm，用液氮冷冻粉碎机粉碎 …