电感耦合等离子体原子发射光谱法测定碘的研究

[Study on the determination of iodine by inductively coupled plasma atomic emission spectrometry].

作者信息

Fan Z, Jin X, Wang Y

机构信息

Analysis Center of Shanxi Teacher's University, 041004 Linfen.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Jun;21(3):370-2.

PMID:12947671

Abstract

A new method for determining iodine had been developed in ICP-AES. An oxidant, NaNO2 and a sample containing iodine ion were mixed in the PHD hydroid generation device, the producing iodine molecules were nebulized in nebulizer and then the iodine gas came into troch directly. The problem that the intensity of iodine decreases with the increase of time was solved. It was found that NaNO2 decreased the effect of Cl- in the low acidity. A detection limit of 14 ng.mL-1 was obtained and the RSD of the measurement for 2 micrograms.mL-1 of iodine was 1.2% (n = 10). The average recoveries of iodine were 99.44%. The method was applied to the determination of salt and seawater.

摘要

已开发出一种在电感耦合等离子体原子发射光谱法（ICP - AES）中测定碘的新方法。将一种氧化剂亚硝酸钠（NaNO₂）与含碘离子的样品在PHD氢化物发生装置中混合，生成的碘分子在雾化器中被雾化，然后碘气体直接进入炬管。解决了碘强度随时间增加而降低的问题。发现亚硝酸钠在低酸度下降低了氯离子的影响。获得了14 ng·mL⁻¹的检测限，对于2 μg·mL⁻¹碘的测量相对标准偏差（RSD）为1.2%（n = 10）。碘的平均回收率为99.44%。该方法应用于盐和海水中碘的测定。