研究了 Cr( ) - DBAV- Triton X- 10 0析相显色体系 ,建立了测定微量铬的析相光度法。在 p H4 .5的乙酸 -乙酸钠介质中 ,Cr( )、DBAV、Triton X- 10 0加热形成配合物 ,于 95℃恒温水浴中析相 1h,即被Triton X- 10 0相完全富集 ,最大吸收峰为 556nm,铬含量在 0— 10μg/5m L范围内服从比耳定律。用于测定水样中的微量铬 ,结果令人满意 The chromogenic system of Cr () - DBAV-Triton X-10 0 was studied and the spectrophotometric method for the determination of trace chromium was established. Cr (), DBAV, Triton X- 10 0 was heated to form a complex in p H4 .5 acetic acid-sodium acetate medium and phase-separated for 1 h in a 95 ° C. thermostat water bath, fully enriched with Triton X- 10 0 phase , The maximum absorption peak is 556nm, and the content of chromium is in the range of 0-10μg / 5m L. For the determination of trace chromium in water samples, the results are satisfactory