钙的主要生理作用是通过钙信使系统对细胞功能起调节作用,钙信使系统可促进骨骼肌、心肌及平滑肌的收缩,促进内外分泌腺的分泌,同时钙具有降低神经兴奋性的作用。因此人体无论是体液,还是组织中Ca含量升高或降低都有一定的生理意义。目前火焰原子吸收法测定生物样品中的Ca含量已广范运用于临床研究,但是由于样品中共存元素的影响,测定值往往会出现一定的偏差,本文着重研究了测 The main physiological role of calcium through the messenger messenger system plays a regulatory role in cell function, messenger messenger system can promote skeletal muscle, myocardial and smooth muscle contraction, and promote the secretion of exocrine and exogenous glands, while calcium can reduce the role of nerve excitability. Therefore, whether the human body fluids, or tissue Ca content increases or decreases have a certain physiological significance. At present, the determination of Ca in biological samples by flame atomic absorption spectrometry has been widely used in clinical research, but due to the influence of the co-existing elements in the sample, the measured values ​​tend to deviate to some extent. In this paper,