在生化研究中,如果镁离子选择性电极能用来测量生物细胞内外镁的话,那末就必需具有表1所示的选择性。由于在细胞外溶液中钠的浓度较高,因此,要求电极对钠的选择性,即抗钠的能力要高。在细胞内,钾的浓度较高,因此,对于细胞内测定来说,电极抗 In biochemical studies, if the magnesium ion selective electrode can be used to measure the biological cells inside and outside the magnesium, then it must have the selectivity shown in Table 1. Due to the high concentration of sodium in the extracellular solution, the electrode is required to be more selective for sodium, ie, more resistant to sodium. In cells, the concentration of potassium is high, so the electrode is resistant to intracellular assays