摘要
本方法是用乙醚萃取工业氯化铵样品中的十八烷基胺后，再用邻菲罗啉分光光度法测定样品中的铁含量。测定波长５１０ｎｍ ，络合物在氯化铵环境中１５～７５ｍｉｎ 内可稳定存在，测定极限为０～０ ．２５ｍｇ 铁，空白试验吸光度值为０．００２，回收率９５．０ ％ ～１０６．０％ ，对同一样品进行８ 次平行测定的测定结果相对标准偏差为１．３９ ％ 。
n-Octadecylamine was extracted and removed by ether and Fe 2+ in industrial grade ammonium chloride was determined by spectrophotometry at 510 nm wavelength with o-phenethroline as a chromogenic agent.Fe 2+ -o-phenethroline complex was stable within 15～75 min in ammonium chloride solution.The detection limit was 0.25 mg Fe. 2+ Blank absorptivity was 0.002.The recovery of Fe 2+ was 95.0%～106.0%.The relative standard deviation for 8 parallel determinations of the same sample was 1.39%.
出处
《云南化工》
CAS
1999年第3期40-42,共3页
Yunnan Chemical Technology
