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目的:使用GC-MS法建立甲磺酸仑伐替尼胶囊中磺酸酯类有关物质检测方法。方法:采用Agilent DB-624毛细管柱(30 m×0.32 mm×1.8μm)色谱柱,起始温度为120℃,维持5 min,以每分钟25℃的速率升温至230℃,维持10 min;进样口温度为250℃;载气为氦气,流速为1.5 mL/min;分流比为5∶1,进样体积1μL;采用质谱检测器,电子轰击离子源(EI),电压为70 eV,接口温度为280℃,离子源温度为230℃,四级杆温度为150℃;检测模式为SIM模式;甲磺酸甲酯检测离子(m/z)为79,甲磺酸乙酯检测离子(m/z)为79,甲磺酸丙酯检测离子(m/z)为109,甲磺酸异丙酯检测离子(m/z)为123。结果:在各离子通道下,空白溶剂、空白辅料不干扰各溶剂检测,各个溶剂之间分离度均大于1.5,各杂质在质量浓度0.04~1.0μg/mL范围内线性关系良好,r不小于0.990,各杂质定量限为0.02 ng,检测限为0.01 ng,各杂质重复性考察结果RSD均小于3.0%(n=6)。结论:方法精密度好、准确度高。可应用于甲磺酸仑伐替尼胶囊中磺酸酯类杂质的检测。 相似文献
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以乙酰乙酸甲氧基乙基酯、乙酰乙酸肉桂醇酯为起始原料,经中间体3-氨基巴豆酸肉桂醇酯,通过Aldol缩合、Hantzsch环合反应,合成出了钙离子拮抗剂西尼地平。该合成工艺安全可行,操作简单,适合工业化生产。 相似文献
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以西尼地平为起始原料,活化MnO2为氧化剂,一步法制备了2,6-二甲基-4-(3-硝基苯基)吡啶-3,5-二甲酸3-(2-甲氧基)乙酯5-(3-苯基)-2(E)-丙烯酯(记为西尼地平杂质Ⅰ).经实验优化,制备西尼地平杂质Ⅰ的最适宜条件为:m(西尼地平):m(MnO2)=1.00:1.24,甲苯为溶剂,105℃下反应1 h.反应得到西尼地平杂质Ⅰ收率为92.3%,经高效液相色谱面积归一化法检测后,纯度达到99.2%.产物结构经HRMS,1HNMR、13CNMR以及FTIR进行确认.该反应实现了西尼地平绿色高效直接转化西尼地平杂质Ⅰ. 相似文献
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以间硝基苯甲醛、乙酰乙酸甲酯及合成的3-氨基-2-丁烯酸乙酯和间硝基苯甲醛、乙酰乙酸乙酯及3-氨基-2-丁烯酸甲酯在离子液体1-丁基吡啶四氟硼酸盐中环合合成第二代1,4-二氢吡啶类钙拮抗剂尼群地平,收率分别为93%和94%,离子液体回收套用至少3次,产物收率没有明显降低。 相似文献
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本文采用离子色谱外标法,对水溶性染料中的微量钙镁离子进行了定量分析。测定结果表明该方法具有很高的精密度和数据重现性,不会对色谱柱造成污染。 相似文献
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氟离子选择电极法测定氟化钙含量 总被引:1,自引:0,他引:1
采用氟离子选择电极法测定氰氨化钙炉料中氟化钙的含量,进行了条件和应用试验.结果表明较佳的条件为:用15 mL的盐酸和硼酸混合酸溶解样品,加热时间3 min;样品称样量0.5 g(准至0.1 mg),当w(CaF2≤1.0%和w(CaF2)=1.0%~2.0%时,测定样品的体积分别为20 mL和10 mL;先用氢氧化钠溶液将pH值调节至~7,再用乙酸钠调至5~6.在此条件下,测定样品的标准偏差<0.03%,RSD<4%,加标回收率为98%~103%;与EDTA容量滴定法比较,平行误差小、准确度好.该方法可以准确测定出氰氨化钙炉料中氟化钙的含量. 相似文献
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Xingyu Shen Liqiu Hu Zhen Li Liyun Wang Xiangchao Pang Chun-Yi Wen Bin Tang 《International journal of molecular sciences》2021,22(18)
Extracellular calcium ion concentration levels increase in human osteoarthritic (OA) joints and contribute to OA pathogenesis. Given the fact that OA is a mechanical problem, the effect of the extracellular calcium level ([Ca2+]) on the mechanical behavior of primary human OA chondrocytes remains to be elucidated. Here, we measured the elastic modulus and cell–ECM adhesion forces of human primary chondrocytes with atomic force microscopy (AFM) at different extracellular calcium ion concentration ([Ca2+]) levels. With the [Ca2+] level increasing from the normal baseline level, the elastic modulus of chondrocytes showed a trend of an increase and a subsequent decrease at the level of [Ca2+], reaching 2.75 mM. The maximum increment of the elastic modulus of chondrocytes is a 37% increase at the peak point. The maximum unbinding force of cell-ECM adhesion increased by up to 72% at the peak point relative to the baseline level. qPCR and immunofluorescence also indicated that dose-dependent changes in the expression of myosin and integrin β1 due to the elevated [Ca2+] may be responsible for the variations in cell stiffness and cell-ECM adhesion. Scratch assay showed that the chondrocyte migration ability was modulated by cell stiffness and cell-ECM adhesion: as chondrocyte’s elastic modulus and cell-ECM adhesion force increased, the migration speed of chondrocytes decreased. Taken together, our results showed that [Ca2+] could regulate chondrocytes stiffness and cell-ECM adhesion, and consequently, influence cell migration, which is critical in cartilage repair. 相似文献
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以柴达木盆地南翼山地区油田水为研究对象,分析检测油田水的组成,针对该油田水钙离子含量高的实际,探讨了分离钙离子的方法。实验结果表明:南翼山地区油田水含K+11782.8mg/L、B2O36613 mg/L、I-71.21 mg/L、Mg2+1512 mg/L、SO42-550 mg/L,Ca2+22892.77 mg/L,有益组分钾、硼、碘含量均超出国家卤水综合利用品位。油田水蒸发结晶时钙在液固两相中均有分布,无明显富集。加入芒硝反应生成硫酸钙沉淀,过滤可以除去大部分钙,剩余的采用沸石吸附,能有效降低钙含量。 相似文献
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