【摘要】 本文研究了Mg²⁺—溴邻苯三酚红（BPR）—溴化十六烷基三甲基氯化铵（CTMAB）的显色反应,探讨了Mg2+—BPR—CTMAB体系的最佳测定条件。实验表明Mg²⁺—BPR—CTMAB体系的最佳pH=9—10,λ_max=680nm,ε=1.3×10⁴L·mol^-1·cm^-1,镁量在0—80μg/50mL内符合比尔定律,该法用于测定铝合金中镁获得满意的结果。更多还原

【Abstract】 The colour reaction of bromopyrogallod red （BPR） and cetyltrimethylammonium bromide （CTMAB） with Mg²⁺ has been studied in this paper. The conditions of the colour reaction with Mg²⁺—BPR—CTMAB has been investigeted The maximun absorptions and apparent molar absorptivity were found to be 680 nm and 1.3×10⁴ L/moL·cm respectively in pH=9. 50NH₃·H₂O—NH₄C1 buffer medium. The method was applied to the determination of trace Magnesium in alloy and a satisfactory result was obtained.更多还原