顶空气相色谱法测定聚乙烯醇中甲醇和乙酸甲酯的残留量
详细信息
| | 加工定制：是 | | 品牌：翔鹰技术 | | 型号：XiangyingGC7990plus | |
| | 测量范围：ppm | | 测量对象：甲醇和乙酸甲酯的残留量 | | 控温范围：450 ℃ | |
| | 功率：2000 w | | 尺寸：480 mm | | 重量：45 kg | |
| | 液化气：甲醇和乙酸甲酯的残留量 | | 二甲醚：顶空气相色谱法测定聚乙烯醇中 | | 炼厂气：粗苯 | |
| | 三苯：二甲苯 | | 变压器油：多氯联苯 | | | |
Polyvinyl alcohol (PVA) is composed of poly vinyl acetate by alkali catalyzed alcoholysis of must, in pharmaceutical preparations for making micro capsule material of microcapsule, membrane agent and coating agent into membrane materials, a wide range of uses, market prospects. At present, the domestic manufacturers are using industrial raw materials, does not meet the regulatory requirements, so the industrial grade PVA purification, production of pharmaceutical grade standard PVA is necessary. Due to safety and environmental protection
Tengzhou City Xiangying Analysis Technology Co., Ltd. to establish XiangyingGC7990plus headspace gas chromatography for the determination of residual organic solvents in polyvinyl alcohol. Using gas chromatography, the stationary phase is quartz capillary column, the carrier gas is nitrogen, the flow rate is 1.0mL / min^-1. The temperature of the detector is 250, and the sample inlet temperature is 200, and the temperature of the program is 40 degrees Celsius, and the temperature is degrees Celsius. The temperature is maintained at 8min, and the temperature of the temperature is 10 degrees Celsius to 150 degrees Celsius, and the temperature is maintained at 2min. The equilibrium temperature is 80 degrees C, the equilibrium time is 30min, the split ratio is 1:1, the water is the solvent, and the acetone is the internal standard. Measured methanol, methyl acetate and internal standard acetone under the chromatographic conditions can get good separation, without interference in the blank control, the peak area and the concentration of detection is a good linear relationship, the correlation coefficient r were 0.9970 and 0.9997; the average recovery rate was 95.0% ~ 103.8% and precision were less than 2.0%. The minimum detection limit was 0.48 mu g - 1 and 0.09 G G ^ - 1 respectively. The HPLC method is sensitive and accurate, which is suitable for the determination of residual organic solvents in polyvinyl alcohol.
聚乙烯醇(简称PVA)是由聚醋酸乙烯酯经碱催化醇解制得,在医药制剂中用于制作微型胶囊的囊材、膜剂和涂膜剂的成膜材料等,用途广泛,市场前景大。目前国内厂家均使用工业级原料,不符合法规要求,因此对工业级PVA进行精制提纯,生产药用级标准的PVA是必要的。由于安全性和环保方面
滕州市翔鹰分析技术有限公司建立XiangyingGC7990plus顶空气相色谱法测定聚乙烯醇有机溶剂残留量。采用气相色谱法测定，固定相为石英毛细管柱，载气为氮气，流速为1．0mL·min^-1。检测器温度为250℃；进样口温度为200℃；程序升温为初始温度40℃，保持8min，以10℃·min^-1升温至150℃，保持2min。顶空进样，平衡温度为80℃，平衡时间为30min，分流比为1：1，水为溶剂，丙酮为内标物。被测物甲醇、乙酸甲酯和内标丙酮在此色谱条件下均能得到很好的分离，空白对照无干扰，峰面积与检测浓度呈良好的线性关系，相关系数r分别为0．9970和0．9997；平均回收率95．0％～103．8％，精密度均小于2．0％，***低检出限分别为0．48μg·mL^-1和0．09μg·mL^-1。本试验建立的色谱方法灵敏、准确，适合药用辅料聚乙烯醇原料中有机溶剂残留量的检测。
The Chinese technology, analysis technology leader
The gas chromatography technology, the industry benchmark enterprise
1 focused on the development of gas chromatograph
2 committed to becoming a leading supplier of analytical instruments in China
3 to provide you with the most powerful support
4 super high cost quality products
5 high quality and perfect after sales service
翔鹰技术，中国分析技术的领跑者
翔鹰技术，气相色谱行业*企业
1.专注气相色谱仪的研制
2.致力于成为国内分析仪器领先供应商
3.为你提供***强有力的支持
4.超高性价比品质过硬产品
5.优质完善快捷的售后服务
扫一扫，手机浏览
