湿法炼铜：Fe+CuSO 4 ＝ FeSO 4 +Cu 【实验】已知排在 金属活动性顺序表最前 3 位的 活泼金属（K Ca Na）能与 水反应 生 碱和氢气。 金属活动性由强逐渐减弱 ①把一块绿豆大的金属钠放酚酞的水中。
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Na K Ca Mg 无机盐类
k-na-ca geothermometer knaca温度计
k na ca mg 钾钠钙镁
k na ca and mg 钾钠钙镁
K Na Cl Ca 血电解质
The contents of elements K, Na, ca, Mg in carbon fibre were determined by atomic absorption spectrophotometry.
碳纤维中的钾、钠、钙、镁元素的含量可用原子吸收分光光度法来测定。
The sample was treated with releasing a-gent lanthanum chloride for the determination of Ca and Mg and treated with cesium chloride solution to suppress ionization for the determination of K and na.
测定钙、镁时，采用氯化镧作为释放剂，测定钾、钠时，采用氯化铯作电离抑制剂。
The contents of metal elements K, Na, Ca and Mg in serum from 60 severe diabetics were detected, and compared with the control group.
对60例重度中老年糖尿病患者进行了血清中钾、钠、钙、镁的含量测定，并与正常对照组进行了比较。
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