Po L, Hengchuan L, Cheng W
Department of Chemistry, East China Normal University, Shanghai 200062, People's Republic of China.
Talanta. 1991 Oct;38(10):1143-6. doi: 10.1016/0039-9140(91)80233-p.
A new thiazolylazo reagent, 2-(2-benzothiazolylazo)-5-dimethylamino-4-tolylarsonic acid, has been synthesized and found to be a good chromogenic reagent for palladium. A 1:1 blue chelate (lambda(max) = 718 nm) is formed in a sulphuric or nitric acid medium. The molar absorptivity is 6.65 x 10(4) l. mole(-1).cm(-1). Beer's law is obeyed in the range 0-1.6 mug/ml Pd. Relatively large amounts of co-existing elements, including noble metals, can be tolerated.
一种新的噻唑基偶氮试剂，2-(2-苯并噻唑基偶氮)-5-二甲基氨基-4-甲苯胂酸，已被合成，并且发现它是钯的一种良好显色试剂。在硫酸或硝酸介质中形成1:1的蓝色螯合物（最大吸收波长λ(max)=718nm）。摩尔吸光系数为6.65×10⁴ l·mol⁻¹·cm⁻¹。在0 - 1.6μg/ml钯的范围内符合比尔定律。包括贵金属在内的相对大量共存元素均可耐受。
