矿石中微量铋的测定多采用硫脲比色法,但灵敏度较低。近年来,虽采用三元络合物体系,但仍难于直接测定矿石中低于ppm级的铋。原子吸收光谱法测定矿石中铋灵敏度虽较高,但干扰严重,需采用分离方法,使铋与大量基体元素分离。催化极谱法测定矿石中铋也有报导,但Cu、Pb、Zn、Fe等干扰严重,亦需通过分离消除干扰。我们曾采用 Determination of trace bismuth ore using thiourea colorimetric method, but lower sensitivity. In recent years, although using ternary complex system, it is still difficult to directly determine the bismuth in the ore below the ppm level. Determination of atomic absorption spectrometry bismuth ore sensitivity is high, but serious interference, the need for separation methods, the bismuth and a large number of matrix elements separated. Catalytic polarographic determination of bismuth ore has also been reported, but Cu, Pb, Zn, Fe and other serious interference, but also through the separation to eliminate interference. We used it