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甲硝唑注射液中亚硝酸盐的测定

2020版《中国药典》中对于甲硝唑注射液中亚硝酸盐的含量测定使用离子色谱法,采用IonPac AS18,采用抑制电导法测定亚硝酸盐的含量。

高效液相色谱法测定紫黄明胶海绵粉中大黄素的含量

紫黄明胶海绵粉是由紫珠和大黄两味中药组成的复方明胶海绵制剂,是用紫珠的水提液和大黄的醇提液浸润明胶海绵,干燥后打粉制成,具有止血、消炎的功效。临床用于各种手术和外伤引起的创面渗血的止血。本研究参考文献,研究建立了高效液相色谱法对紫黄明胶海绵粉中大黄素的含量进行测定。该方法快速、灵敏、准确。

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高效液相色谱仪

高效液相色谱仪

型号:LC-600A

上海佳航:自动旋光仪法检测 L-半胱氨酸的含量(旋光仪)

L-半胱氨酸是一种氨基酸类解药,它参与细胞的还原过程和肝脏内的磷脂代谢,有保护肝细胞不受损害,促进肝脏功能恢复和旺盛的药理效应。目前国内外检测半胱胺酸含量的方法有很多,电化学法、流动注射化学发光法、催化动力学分光光度法、旋光法、高效液相色谱法等,本文采用用旋光度法测定其含量简单易行、快速准确。

推荐
产品
全自动数字旋光计

全自动数字旋光计

型号:Digipol-P630

H-FLOW全自动加氢反应仪在脱苄基反应中的应用

在药品和精细化学品的生产中,经常需要对醇和胺等官能团进行保护和脱保护。脱保护反应的研究不仅决定了合成的成败,而且也会影响反应能否继续进行,因此是合成反应中及其重要的环节。苄基是重要的有机官能团保护基团,在一定条件下相对稳定,易在温和条件下脱去。据估计,超过1000种药物合成过程中需进行脱苄基反应。因此,寻求绿色环保、高收率的脱苄基工艺迫在眉睫。

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产品

滴定仪在2020年版《中国药典》的应用—腺苷含量的测定

腺苷(Adenosine, AD)即腺嘌呤核苷,是机体RNA的代谢产物,属于生物小分子化合物,它是一种内源性核苷,能参与血管神经舒张活动,具有抗心律失常的功效。在中枢神经系统中,它对神经传递的调节及对抵抗缺血性与疾病性神经伤害等方面具有重要作用。2020年版《中国药典》中新增了腺苷及腺苷注射液,腺苷含量的测定依据电位滴定法(通则0701),冰醋酸作溶剂,用高氯酸标准滴定溶液滴定至终点。

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产品
雷磁 自动滴定仪

雷磁 自动滴定仪

型号:ZDJ-5B

CAD检测器在奥贝胆酸质量控制中的应用研究

本文结合质量通用型检测器-电雾式检测器(CAD)建立一种简单、快速的HPLC方法,对奥贝胆酸及有关物质的分离与检测进行了初步研究。通过优化梯度洗脱程序,可实现奥贝胆酸与多种有关物质的有效分离。在此方法下,多种不同批次的奥贝胆酸样品均得到了理想的检测结果。本方法检出效果好、灵敏度高、重复性好、线性范围宽广,对奥贝胆酸的质量控制研究具有一定指导意义。

推荐
产品
赛默飞液相系统

赛默飞液相系统

型号:Ultimate 3000 RSLCnano
赛默飞顶空自动进样器

赛默飞顶空自动进样器

型号:Triplus 500

药物溶出仪是如何进行片剂溶出度测定的?

溶出度系指药物从片剂或胶囊剂等固体制剂在规定溶剂中溶出的速度和程度。但在实际应用中溶出度仅指一定时间内药物溶出的程度,一般用标示量的百分率表示,如药典规定30分钟内对乙酰氨基酚的溶出限度为标示量的80%。药物溶出仪是如何进行片剂溶出度测定的?我们以RCY-808T为例,讲解一下智能溶出仪测定片剂溶出度的过程。

推荐
产品

高效液相尺寸排阻色谱法测定注射用胸腺肽中α1的含量

采用TSKgel UP-SW2000超高效液相尺寸排阻色谱柱,使用乙腈-水-TFA:(体积比:40:60:0.07)流动相,在紫外检测波长214 nm条件下,对注射用胸腺肽中胸腺肽α1进行分离和测定。供试品的分析结果显示,分子量大于10000道尔顿的组分所占比例为2.38%,满足标准不得超过5%的要求。对应胸腺肽α1对应峰面积百分比为1.84%,满足标准规定不低于1%的要求。

高效微流电动液相色谱系统分离检测手性化合物

采用TriSep ®-3000高效微流电动液相色谱系统,在单(6A-N-乙烯二胺-6A-脱氧)苯甲酰化β-CD键合硅胶颗粒上,分离了一系列α-氨基磷酸中性对映体。并将其作为手性固定相用于微流液相色谱法和高效微流电动液相色谱法。

推荐
产品
高效微流电动液相色谱系统

高效微流电动液相色谱系统

型号:TriSep@-3000

芬太尼现场快检与物联网解决方案

卓立汉光基于现有物联网平台,运用大数据、物联网、云端管理、人工智能等技术手段,并结合拉曼光谱、红外光谱及其联用技术等光谱快检装备,构建了芬太尼物联网检测与防控系统,实现芬太尼的可管可治、严防严控,有效抑制芬太尼的蔓延。

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产品
傅里叶变换红外光谱仪FOLI 20-Z

傅里叶变换红外光谱仪FOLI 20-Z

型号:FOLI 20-Z
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