化学世界
化學世界
화학세계
CHEMICAL WORLD
2010年
1期
15-17
,共3页
铁%二氨基顺丁烯二腈%荧光猝灭%米粉
鐵%二氨基順丁烯二腈%熒光猝滅%米粉
철%이안기순정희이정%형광졸멸%미분
iron%DAMN%flourescence quenching%infant cereal
根据铁对二氨基顺丁烯二腈的荧光具有猝灭的特性,建立了一种测定痕量铁的新方法.体系的最大激发波长为226 nm,最大发射波长为406 nm.线性范围为0.01～0.48 mg/L,相关性系数为0.996 2,检出限为1.5 μg/L.对10份含有0.16 mg/L的铁标准溶液进行精密度检测,其相对标准偏差为0.17%.用该方法测定了婴幼儿米粉中的铁,结果令人满意.
根據鐵對二氨基順丁烯二腈的熒光具有猝滅的特性,建立瞭一種測定痕量鐵的新方法.體繫的最大激髮波長為226 nm,最大髮射波長為406 nm.線性範圍為0.01～0.48 mg/L,相關性繫數為0.996 2,檢齣限為1.5 μg/L.對10份含有0.16 mg/L的鐵標準溶液進行精密度檢測,其相對標準偏差為0.17%.用該方法測定瞭嬰幼兒米粉中的鐵,結果令人滿意.
근거철대이안기순정희이정적형광구유졸멸적특성,건립료일충측정흔량철적신방법.체계적최대격발파장위226 nm,최대발사파장위406 nm.선성범위위0.01～0.48 mg/L,상관성계수위0.996 2,검출한위1.5 μg/L.대10빈함유0.16 mg/L적철표준용액진행정밀도검측,기상대표준편차위0.17%.용해방법측정료영유인미분중적철,결과령인만의.
A new method for the determination of trace amounts of iron has been developed.This method is based on the quenching of fluorescence of.diaminomaleonitrile(DAMN)due to the formation of the complex Fe(Ⅲ)-DAMN.The exitation and emission wavelengths were found to be 226 nm and 406 nm,respectively.There was a linear relationship in the range of 0.01～0.48 mg/L for Fe(Ⅲ),and the correlative coefficient was 0.996 2.The detection limit was 1.5 μg/L for Fe(Ⅲ).The RSD was 0.17%(n=10)for 0.16 mg/L Fe(Ⅲ).This method is simple and rapid,and has been applied to the determination of iron in infant cereal with satisfactory results.
