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Preliminary measurement of gas concentrations of perfluropropane using an analytical weighing balance

机译：使用分析天平初步测量全氟丙烷的气体浓度

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摘要

We describe the use of an analytical weighing balance of measurement accuracy 0.00001g for determination of concentrations of perfluropropane (C3F8) gas used in ophthalmic surgical vitrectomy procedures. A range of test eyes corresponding to an eye volume of 6.1ml were constructed using 27 gauge needle exit ducts and separately 20 gauge (straight) and 23 gauge (angled) entrance ports. This method allowed determination of concentration levels in the sample preparation syringe and also levels in test eyes. It was determined that a key factor influencing gas concentrations accuracy related to the method of gas fill and the value of dead space of the gas preparation/delivery system and with a significant contribution arising from the use of the particle filter. The weighing balance technique was identified as an appropriate technique for estimation of gas concentrations.
机译：我们描述了使用测量精度为0.00001g的分析称重天平来确定用于眼科手术玻璃体切除手术的全氟丙烷（C3F8）气体的浓度。使用27个规格的针头出口导管和20个规格（直形）和23个规格（成角度）的入口孔构造了相当于6.1ml眼容量的一系列测试眼睛。该方法可以确定样品制备注射器中的浓度水平以及测试眼中的浓度水平。已确定影响气体浓度准确性的关键因素与气体填充方法和气体制备/输送系统的死空间值有关，并且使用颗粒过滤器会产生重大影响。称量天平技术被认为是估算气体浓度的合适技术。

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