HH-WAX 毛细管柱测定依地酸二钠中甲醛残留量

毛细管柱测定依地酸二钠中甲醛残留量，液化石油气，二甲醚，甲缩醛，室内空气，增塑剂，塑化剂，乙酸乙酯，医疗器械，氨水，增塑剂，顶空进样器，裂解进样器，医疗器械，EO，顶空

毛细管柱测定依地酸二钠中甲醛残留量
毛细管柱测定依地酸二钠中甲醛残留量 详细信息：

浩瀚色谱（山东）应用技术开发有限公司建立依地酸二钠(EDTA-2Na)中残留甲醛的测定方法。方法:采用顶空气相色谱法测定。HH-WAX气相毛细管柱(30 m×0.25 mm,0.25μm),分流进样,分流比为2∶1;载气为N_2,流速为1.0 ml·min~(-1);检测器为FID;进样口温度为230℃,检测器温度为260℃;采用程序升温法:起始温度40℃,保持6 min,再以40℃·min~(-1)速率升温到230℃后,维持10min;进样量为1μl。分别取对照品溶液和供试品溶液,95℃加热平衡25 min,顶空进样,按外标法以峰面积计算含量。结果:甲醛标准溶液在5.10~102.00μg·ml~(-1)浓度范围内与峰面积的线性关系良好(r=0.999 7),平均回收率为84.60%(RSD=3.82%,n=9)。结论:本方法简单、快速、准确,可以用于依地酸二钠中甲醛残留量的测定。

毛细管柱测定依地酸二钠中甲醛残留量  测试谱图：




Determination of Residual Formaldehyde in Disodium Edetate by Capillary Column
Determination of formaldehyde residues in disodium edetate by capillary column Details:

Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. established a method for the determination of residual formaldehyde in disodium edetate (EDTA-2Na). Methods: Determined by headspace gas chromatography. HH-WAX gas-phase capillary column (30 m×0.25 mm, 0.25 μm), split injection, split ratio of 2:1; carrier gas was N_2, flow rate was 1.0 ml·min~(-1); detector was FID; The temperature of the injection port was 230 °C, and the temperature of the detector was 260 °C; the temperature program was adopted: the initial temperature was 40 °C, maintained for 6 min, and then heated to 230 °C at a rate of 40 °C min~(-1), and maintained for 10 min ; The injection volume is 1 μl. Take the reference solution and the test solution respectively, heat and equilibrate at 95 ℃ for 25 min, inject the sample into the headspace, and calculate the content by the peak area according to the external standard method. Results: The formaldehyde standard solution had a good linear relationship with the peak area in the concentration range of 5.10~102.00μg·ml~(-1) (r=0.999 7), and the average recovery was 84.60% (RSD=3.82%, n=9). . Conclusion: The method is simple, rapid and accurate, and can be used for the determination of formaldehyde residues in disodium edetate.

Determination of formaldehyde residue in disodium edetate by capillary column Test spectrum: