CAJ | 학술논문

利用湿碱式化学提取技术和电感耦合等离子体发射光谱仪,优化样品碱式消解方法,确定仪器最佳工作条件,建立了测定海洋沉积物中不同含量级别生物硅的方法.结果表明,仪器检出限为0.724 μmol/L,方法检出限为0.942 μmol/L.用于测定硅酸盐-硅溶液成分分析国家一级标准物质(GBW 08648和GBW 08649,标准值分别为50.0 μmol/L和100.0 μmol/L),测定值分别为(49.888±0.275) μmol/L、(99.578±0.651) μmol/L,相对标准偏差为0.443%、0.527%;对于不同生物硅含量级别海洋沉积物样品的平行、独立测量,其相对标准偏差＜8.9%.方法快速、简便、准确,可满足古海洋学不同时空尺度气候和环境分析的应用.
이용습감식화학제취기술화전감우합등리자체발사광보의,우화양품감식소해방법,학정의기최가공작조건,건립료측정해양침적물중불동함량급별생물규적방법.결과표명,의기검출한위0.724 μmol/L,방법검출한위0.942 μmol/L.용우측정규산염-규용액성분분석국가일급표준물질(GBW 08648화GBW 08649,표준치분별위50.0 μmol/L화100.0 μmol/L),측정치분별위(49.888±0.275) μmol/L、(99.578±0.651) μmol/L,상대표준편차위0.443%、0.527%;대우불동생물규함량급별해양침적물양품적평행、독립측량,기상대표준편차＜8.9%.방법쾌속、간편、준학,가만족고해양학불동시공척도기후화배경분석적응용.
A method for the determination of biogenic opal with a wide content range in marine sediments using inductively coupled plasma-atomic emission spectrometry (ICP-AES) with wet alkaline digestion was reported in this paper. The chemical pretreatment procedure and instrument operation parameters for biogenic opal analysis were optimized. The detection limits of the instrument and method for biogenic opal were 0.724 μmol/L and 0.942 μmol/L respectively. The method has been verified by analyzing the National Standard Reference Materials (NSRMs) of GBW 08648 and GBW 08649 and the analytical results of biogenic opal in these two NSRMs were in agreement with the certified values with precision of 0.443%RSD and 0.527%RSD respectively. The method has also been applied to the determination of biogenic opal in marine sediments with precision of less than 8.9% RSD and provides a simple, accurate and efficient means for biogenic opal measurement in climate and environment investigation with various temporal and spatial scales in paleoceanography.