分析化学
分析化學
분석화학
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
2001年
3期
293-295
,共3页
硅%姜黄素%十六烷基三甲基溴化铵%抑制作用%褪色光度法
硅%薑黃素%十六烷基三甲基溴化銨%抑製作用%褪色光度法
규%강황소%십륙완기삼갑기추화안%억제작용%퇴색광도법
基于NH3-NH4Cl缓冲溶液介质中,Si(Ⅳ)对H2O2氧化十六烷基三甲基溴化铵-姜黄素离子缔合物的褪色反应的抑制作用,提出了测定痕量硅新的高灵敏的褪色光度法。该方法的表观摩尔吸光系数ε500=5.70×105L*mol-1*cm-1;线性范围为0.4~3.6 μg/L;线性回归方程ΔA=2.23×10-4+0.02017CSi(Ⅳ)(μg/L);相关系数r=0.9999;测定下限为2.0×10-8 g/L。本法用于人发样和水样中痕量硅的测定,结果满意
基于NH3-NH4Cl緩遲溶液介質中,Si(Ⅳ)對H2O2氧化十六烷基三甲基溴化銨-薑黃素離子締閤物的褪色反應的抑製作用,提齣瞭測定痕量硅新的高靈敏的褪色光度法。該方法的錶觀摩爾吸光繫數ε500=5.70×105L*mol-1*cm-1;線性範圍為0.4~3.6 μg/L;線性迴歸方程ΔA=2.23×10-4+0.02017CSi(Ⅳ)(μg/L);相關繫數r=0.9999;測定下限為2.0×10-8 g/L。本法用于人髮樣和水樣中痕量硅的測定,結果滿意
기우NH3-NH4Cl완충용액개질중,Si(Ⅳ)대H2O2양화십륙완기삼갑기추화안-강황소리자체합물적퇴색반응적억제작용,제출료측정흔량규신적고령민적퇴색광도법。해방법적표관마이흡광계수ε500=5.70×105L*mol-1*cm-1;선성범위위0.4~3.6 μg/L;선성회귀방정ΔA=2.23×10-4+0.02017CSi(Ⅳ)(μg/L);상관계수r=0.9999;측정하한위2.0×10-8 g/L。본법용우인발양화수양중흔량규적측정,결과만의
A new spectrophotometric method for the determination of trace amount of silicon was developed. It is based on the fact that Si(Ⅳ) inhibits discoloration of the ion-association complex of cetyltrimethylammonium-curcumin by H2O2 in the NH3-NH4Cl buffer medium. The apparent molar absorption coefficient ε500=5.70×105 L*mol-1*cm-1. The Beer′s law is obeyed in the range of 0.4~3.6 μg/L with a linear regression equation ΔA=2.23×10-4+0.02017CSi(μg/L),r=0.9999. The determination limit is 2.0×10-8 g/L. The method has been used for the determination of silicon in water and hair samples with satisfactory results.