摘要
建立了离子色谱-电感耦合等离子体质谱联用技术(IC-ICP-MS)测定溶液中溴酸根离子(BrO3-)和溴离子(Br-)的方法。使用Hamilton PRP X-100(150×4.1mm,10μm)阴离子交换柱,On-guardⅡRP(4×50mm)保护柱,采用10mmol·L-1 NH4NO3作为淋洗液,在流速2mL·min-1下分离BrO3-和Br-。其中BrO3-在标准溶液浓度4.8～160.0ng·L-1范围内线性良好,y=250.31x-45.43,R2=0.9999;Br-在标准溶液浓度4.2～140.0ng·L-1范围内线性良好,y=186.84x-127.10,R2=0.9994。加标回收率分别为98.9%～109.5%和97.4%～106.1%。测定样品包括中成药、瓶装饮用水、自来水、河水、酒类、果汁和碳酸饮料等。其中14种瓶装饮用水和2种自来水中检出BrO3-,其余样品均未检出BrO3-。而Br-则普遍存在于各种样品中。
In the present study,a method for determination of BrO3-and Br-using ion chromatograghy coupling with inductively coupled plasma mass spectrometry（IC-ICP-MS） was developed.BrO3- and Br- were separated on a Hamilton PRP X-100（150× 4.1mm,10μm） column guarding with a On-guard Ⅱ RP（4×50mm） column with 10mmol·L-1 NH4NO3 eluent solution at 2 mL·min-1.By using 200μL sample loop,the detection limits for BrO3- and Br- were 0.35 and 0.36μg·L-1,respectively.BrO3- had good linearity in the range 4.8-160.0ng·L-1.The standard solution linear equation was y=250.31x-45.43,and R2=0.999 9.Br-had good linearity in the range 4.2-140.0ng·L-1.The standard solution linear equation was y=186.84x-127.10,and R2=0.999 4.Recoveries of spiked samples were 98.9%-109.5% and 97.4%-106.1%,respectively.The samples included various kinds of Chinese patent drugs,waters,and beverages.Among them,14 bottled drinking waters and 2 kinds of tap waters were found containing BrO3-,while other samples were under BrO3-detection limit.Br-was detected in all samples.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2010年第11期3136-3139,共4页
Spectroscopy and Spectral Analysis
基金
科技部"重大新药创制"科技重大专项(2009ZX09502-027)资助
