However, only about one-third of the soluble calcium and magnesium is ionized, the remainder is bound to citrate, phosphate and bicarbonate in a number of complex undissociated ions, e.g. Ca citrateion, CaPO4, CaHCO3+.

• 然而实际上只有13的钙和镁以离子形式存在,蓁的全为部以复杂离子的形式与柠檬酸盐、磷酸盐和重碳酸协结合,如Ca柠檬酸盐离子