CAJ | 학술논문

研究了离子色谱-电感耦合等离子体质谱 (IC-ICPMS) 联用技术直接进样测定海水中 IO_3~-和I~-的方法.采用 IonPac AG23离子色谱保护柱分离IO_3~-和I~-,以浓度4.0mmol/dm~3的KOH为流动相,流量为1.0cm~3/min,每个样品的分析时间为2.5min.采用2.5×10~(-3)cm~3的进样量,IO_3~-和I~-的检出限分别达到 0.6和0.4nmol/dm~3,可满足海水中碘形态的定量分析.该方法的IO_3~-和I~-浓度范围在2.0nmol/dm~3～2.0μmol/dm~3.
연구료리자색보-전감우합등리자체질보 (IC-ICPMS) 련용기술직접진양측정해수중 IO_3~-화I~-적방법.채용 IonPac AG23리자색보보호주분리IO_3~-화I~-,이농도4.0mmol/dm~3적KOH위류동상,류량위1.0cm~3/min,매개양품적분석시간위2.5min.채용2.5×10~(-3)cm~3적진양량,IO_3~-화I~-적검출한분별체도 0.6화0.4nmol/dm~3,가만족해수중전형태적정량분석.해방법적IO_3~-화I~-농도범위재2.0nmol/dm~3～2.0μmol/dm~3.
A method based on IC-ICP-MS is developed for simultaneous determination of iodate and iodide in seawater using direct injection of sample.Using an IonPac AG23 guard column and an ASRS-ULTRA suppressor for the separation of an eluent 4 mmol/dm~3 KOH and 1 cm~3/min flow rate,the elapsed time is less than 2.5min. Using 2.5 mm~3 seawater sample loop,the detection limit is of 0.6 nmol/ dm~3 for iodate and 0.4 nmol/ dm~3 for iodide,which can satisfy the requirement of detection of iodine speciation in seawater.The linear range for both species is between 2.0 nmol/ dm~3 and 2.0 μmol/dm~3.