湖北师范学院学报(自然科学版)
湖北師範學院學報(自然科學版)
호북사범학원학보(자연과학판)
JOURNAL OF HUBEI NORMAL UNIVERSITY(NATURAL SCIENCE)
2013年
4期
84-87
,共4页
钟立群%庾翔%周兴旺%吕鉴泉
鐘立群%庾翔%週興旺%呂鑒泉
종립군%유상%주흥왕%려감천
化学发光%流动注射%湖水%砷
化學髮光%流動註射%湖水%砷
화학발광%류동주사%호수%신
chemiluminescence%flow injection%lake water%arsenic
基于As( III)在碱性介质中对Luminol -KMnO4体系化学发光抑制作用,建立一种测定湖水中As ( III)的新方法。工作中,对泵速、光电倍增管高压、Luminol和KMnO4的浓度等实验参数进行了优化。结果表明,在优化条件下,1×10-4~1.2×10-2 mg/L的As(III)对Luminol-KMnO4发光的减弱有良好的线性关系(R2=0.9970),检出限为8.2×10-5mg/L,相对标准偏差(RSD)(n=11,c =5×10-3mg/L)为0.5%.该方法具有简便、快速、准确、重现性好等特点,可用于湖水中As(III)的测定,结果令人满意。
基于As( III)在堿性介質中對Luminol -KMnO4體繫化學髮光抑製作用,建立一種測定湖水中As ( III)的新方法。工作中,對泵速、光電倍增管高壓、Luminol和KMnO4的濃度等實驗參數進行瞭優化。結果錶明,在優化條件下,1×10-4~1.2×10-2 mg/L的As(III)對Luminol-KMnO4髮光的減弱有良好的線性關繫(R2=0.9970),檢齣限為8.2×10-5mg/L,相對標準偏差(RSD)(n=11,c =5×10-3mg/L)為0.5%.該方法具有簡便、快速、準確、重現性好等特點,可用于湖水中As(III)的測定,結果令人滿意。
기우As( III)재감성개질중대Luminol -KMnO4체계화학발광억제작용,건립일충측정호수중As ( III)적신방법。공작중,대빙속、광전배증관고압、Luminol화KMnO4적농도등실험삼수진행료우화。결과표명,재우화조건하,1×10-4~1.2×10-2 mg/L적As(III)대Luminol-KMnO4발광적감약유량호적선성관계(R2=0.9970),검출한위8.2×10-5mg/L,상대표준편차(RSD)(n=11,c =5×10-3mg/L)위0.5%.해방법구유간편、쾌속、준학、중현성호등특점,가용우호수중As(III)적측정,결과령인만의。
A new method for the determination of arsenic ion in water based on the decreasing effect of arsenic ion on Luminol-KMnO4 chemiluminescence system in alkaline solution has been developed by flow -injection chemiluminescence method . The detecting parameters, such as flow rate, high voltage of PMT, concentration of Luminol and KMnO4, were optimized.Un-der the optimum conditions , the emission intensity is proportional to the concentration of arsenic ion in the range of 1 ×10 -4 ~1.2 ×10-2 mg/L.The detection limit for arsenic ion (S/N=3) turned out to be 8.2 ×10 -5 mg/L, and the relative standard deviation for 11 determinations using a 5 ×10 -3 mg/L arsenic ion containing solution is 0.5%.The method is simple, rapid, accurate and good reproducibility .The proposed method has been successfully applied to the determination of arsenic ion in re -al samples with satisfactory results .