The effect of glass former (constituent capable to vitrify by itself such as B₂O₃, SiO₂, GeO₂ and P₂O₅) addition to Fe₂O₃-Bi₂O₃ (FeBi) glass on pH responsivity (pH sensitivity and pH response time) was investigated in order to develop novel pH responsive, hydrophobic glasses. Additionally, the effect of glass composition on pH sensitivity of Fe₂O₃-Bi₂O₃ glasses was investigated in order to develop contaminant-free reference electrodes with very low pH sensitivity. A small amount of B₂O₃ and SiO₂ drastically increased the pH sensitivity. The addition of glass formers of 20 mol% provided high pH sensitivity (>90%) in any of the glass formers. Although all glass formers increased their contact angle with water for Fe₂O₃-Bi₂O₃ glass, the addition of GeO₂ was most effective. Most of the Fe₂O₃-Bi₂O₃-GeO₂ (FeBiGe) glasses with 20–30 mol% GeO₂, which serve as a working electrode, had compatibility between high pH sensitivity and a high contact angle with water (100°). However, certain Fe₂O₃-Bi₂O₃ glasses with approximately 20 mol% Fe₂O₃ showed low pH sensitivity (<10%). These FeBi glasses are considered to serve as contaminant-free reference electrodes, whereas KCl aqueous solution, as a contaminant, gradually leaks in commercial reference electrodes (Ag/AgCl immersed in KCl aqueous solution). Since the novel pH complex glass electrodes, consisting of a FeBiGe working electrode and a FeBi reference electrode, resist fouling of itself and serve as contaminant-free glass electrodes, these electrodes are expected to be highly useful in biological systems and drug development.

向Fe ₂ O ₃ -Bi ₂ O ₃（FeBi）玻璃中添加玻璃形成剂（能够自我玻璃化的成分，例如B ₂ O ₃，SiO ₂，GeO ₂和P ₂ O ₅）对pH响应度（pH）的影响为了开发新型的pH响应型疏水性玻璃，我们对灵敏度和pH响应时间进行了研究。另外，玻璃组成对Fe ₂ O ₃ -Bi ₂ O _3的pH敏感性的影响对玻璃进行了研究，以开发具有非常低的pH敏感性的无污染参比电极。少量的B ₂ O ₃和SiO ₂大大提高了pH敏感性。在任何一种玻璃形成剂中，添加20 mol％的玻璃形成剂均可提供较高的pH敏感性（> 90％）。尽管所有玻璃形成剂均增加了Fe ₂ O ₃ -Bi ₂ O ₃玻璃与水的接触角，但添加GeO ₂最为有效。大部分具有20–30 mol％GeO ₂的Fe ₂ O ₃ -Bi ₂ O ₃ -GeO ₂（FeBiGe）玻璃用作工作电极，具有高pH敏感性和与水的高接触角（100°）之间的兼容性。但是，某些Fe ₂ O ₃ -Bi ₂ O ₃玻璃具有约20 mol％的Fe ₂ O ₃表现出较低的pH敏感性（<10％）。这些FeBi玻璃被认为是无污染的参比电极，而作为污染物的KCl水溶液则逐渐在商业参比电极中泄漏（将Ag / AgCl浸入KCl水溶液中）。由于由FeBiGe工作电极和FeBi参比电极组成的新型pH络合物玻璃电极可防止自身结垢并用作无污染的玻璃电极，因此这些电极有望在生物系统和药物开发中非常有用。