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Quantitative analysis of lactic acid oligomers from dimer to 15mer in poly(D,L-lactide) (PDLLA) polymers
International Journal of Polymer Analysis and Characterization ( IF 1.7 ) Pub Date : 2021-01-07 , DOI: 10.1080/1023666x.2020.1863630
Xiaoyi Hu 1 , Marika Kamberi 1 , Xinmin Xu 1
Affiliation  

Abstract Poly(D,L-lactide) (PDLLA) polymer is widely used in biomedical applications. To control the degradation of PDLLA, as well as to ensure effective quality control of the polymer raw material, it is essential to have analytical methods capable of analyzing the PDLLA oligomer species content quantitatively. In this study, liquid chromatography-mass spectrometry (LC-MS) based analytical methods were developed to quantitate oligomer species from dimer to 15mer (total of 14 analytes) in the PDLLA polymer resin. Negative electrospray ionization was employed as the LC-MS interface. For the lactic acid dimer and trimer analysis, a SIELC Primesep SB column was used for high performance liquid chromatography (HPLC) separation and selected reaction monitoring (SRM) was used as the acquisition mode. For other lactic acid oligomer (4mer to 15mer) analysis, a Phenomenex Synergi™ 4 µm Polar-RP column was used, and selected ion monitoring (SIM) was used as the acquisition mode. Both columns demonstrated good tolerability for samples with high polymer content which is critical for method development. Analytical parameters such as calibration, correlation, accuracy, and precision were evaluated. Quadratic functions best described the correlation between response and concentration for each oligomer analyte. Excellent accuracy and precision were demonstrated with both methods. The methods developed in this study can be used to evaluate the impact of manufacturing process on polymers and can also be a good reference for oligomer analysis method development of similar polymers.

中文翻译:

聚(D,L-丙交酯)(PDLLA)聚合物中从二聚体到15聚体的乳酸低聚物的定量分析

摘要 聚(D,L-丙交酯)(PDLLA)聚合物广泛应用于生物医学领域。为了控制 PDLLA 的降解,以及确保聚合物原材料的有效质量控制,必须拥有能够定量分析 PDLLA 低聚物种类含量的分析方法。在本研究中,开发了基于液相色谱-质谱 (LC-MS) 的分析方法来定量 PDLLA 聚合物树脂中从二聚体到 15 聚体(总共 14 种分析物)的低聚物种类。采用负电喷雾电离作为 LC-MS 接口。对于乳酸二聚体和三聚体分析,SIELC Primesep SB 色谱柱用于高效液相色谱 (HPLC) 分离,选择反应监测 (SRM) 作为采集模式。对于其他乳酸低聚物(4mer 至 15mer)分析,使用 Phenomenex Synergi™ 4 µm Polar-RP 色谱柱,选择离子监测 (SIM) 作为采集模式。两种色谱柱对聚合物含量高的样品均表现出良好的耐受性,这对于方法开发至关重要。对校准、相关性、准确度和精密度等分析参数进行了评估。二次函数最好地描述了每个低聚物分析物的响应与浓度之间的相关性。两种方法都证明了出色的准确度和精密度。本研究开发的方法可用于评估制造工艺对聚合物的影响,也可为类似聚合物的低聚物分析方法开发提供良好的参考。选择离子监测(SIM)被用作采集模式。两种色谱柱对聚合物含量高的样品均表现出良好的耐受性,这对于方法开发至关重要。对校准、相关性、准确度和精密度等分析参数进行了评估。二次函数最好地描述了每个低聚物分析物的响应与浓度之间的相关性。两种方法都证明了出色的准确度和精密度。本研究开发的方法可用于评估制造工艺对聚合物的影响,也可为类似聚合物的低聚物分析方法开发提供良好的参考。并且选择离子监测(SIM)被用作采集模式。两种色谱柱对聚合物含量高的样品均表现出良好的耐受性,这对于方法开发至关重要。对校准、相关性、准确度和精密度等分析参数进行了评估。二次函数最好地描述了每个低聚物分析物的响应与浓度之间的相关性。两种方法都证明了出色的准确度和精密度。本研究开发的方法可用于评估制造工艺对聚合物的影响,也可为类似聚合物的低聚物分析方法开发提供良好的参考。对校准、相关性、准确度和精密度等分析参数进行了评估。二次函数最好地描述了每个低聚物分析物的响应与浓度之间的相关性。两种方法都证明了出色的准确度和精密度。本研究开发的方法可用于评估制造工艺对聚合物的影响,也可为类似聚合物的低聚物分析方法开发提供良好的参考。对校准、相关性、准确度和精密度等分析参数进行了评估。二次函数最好地描述了每个低聚物分析物的响应与浓度之间的相关性。两种方法都证明了出色的准确度和精密度。本研究开发的方法可用于评估制造工艺对聚合物的影响,也可为类似聚合物的低聚物分析方法开发提供良好的参考。
更新日期:2021-01-07
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