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全国稀土推广应用展览会十一月中旬将在北京展出。我校分析化学研究室近几年来又研制了对氯偶氮胂、对溴偶氮胂、对乙酰基偶氮胂、对二甲氨基偶氮胂、间溴偶氮胂、间氯偶氮胂、间乙酰基偶氮胂、对氯偶氮磺、对溴偶氮磺、对硝基偶氮磺、间(对)碘偶氮胂、间(对)甲酰基偶氮胂、间(对)甲酰基偶氮磺等新型稀土显色剂。这次选送到全国稀土推广应用展览会展出的有如以下几种高灵敏度稀土显色剂: (1)对溴偶氮胂在pH4.0—4.5与稀土产生极灵敏的显色反应,铈的克分子吸光系数(ε)为3.55×10~5,是目前最灵敏的稀土显色剂。
National Rare Earth Promotion and Application Exhibition will be exhibited in Beijing in mid-November. In recent years, the Analytical Chemistry Laboratory of our school has also developed a series of methods for the determination of arsenazo, p-bromoarsenazo, p-acetylazoarsenazo, p-dimethylazoarsenazo, m-bromoarsenazo, , P-acetylarsenazo, p-chloroazo, p-bromoazo, p- nitroazo, m-iodoarsenazo, m- Formyl azo and other new rare earth color reagent. This selection of rare earth to promote the National Exhibition on the display of the following types of high sensitivity rare earth developer: (1) bromine arsenazo at pH4.0-4.5 with rare earth produced extremely sensitive color reaction, cerium Molecular absorption coefficient (ε) of 3.55 × 10 ~ 5, is the most sensitive rare earth developer.