【引用本文】 张莉娟, 徐铁民, 方蓬达, 等. 超细固体悬浮液进样-电感耦合等离子体质谱法测定土壤中的微量元素[J]. 岩矿测试, 2019, 38(2): 147-153. doi: 10.15898/j.cnki.11-2131/td.201712190195
ZHANG Li-juan , XU Tie-min , FANG Peng-da , et al. Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling[J]. Rock and Mineral Analysis, 2019, 38(2): 147-153. doi: 10.15898/j.cnki.11-2131/td.201712190195

超细固体悬浮液进样-电感耦合等离子体质谱法测定土壤中的微量元素

中国地质调查局天津地质调查中心, 天津 300172

收稿日期: 2017-12-19  修回日期: 2018-04-23 

作者简介: 张莉娟,高级工程师,从事岩石矿物的光谱分析。E-mail:zhanglij19@163.com。。

Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling

Tianjin Center of Geological Survey, China Geological Survey, Tianjin 300172, China

Received Date: 2017-12-19
Revised Date: 2018-04-23

摘要:固体进样技术应用于土壤样品测量领域,一直受制于样品粒径的限制,无法应用在配有气动雾化器的分析仪器上。本文系统研究了土壤样品超细粉碎技术,在乙醇介质下,数分钟内将其粉碎至微米级,经此制成的固体悬浮液直接进行电感耦合等离子体质谱法(ICP-MS)测定,可以避免气动雾化器的堵塞。标准物质测定表明,样品粒径为6.8μm时,固体悬浮液进样仍然存在干扰,通过在固体悬浮液中加入少量氢氟酸和硝酸,对固体悬浮液进行改性,减小了固体悬浮液中固体颗粒粒径,从而减少了样品粒径的影响,可用ICP-MS测定土壤中锂铍钒铬镍铜锌铷锶镉铯钡铅等13个微量元素。经国家一级标准物质验证,本方法的最大相对误差在10.5%左右,多数元素的相对误差小于5%,相对标准偏差(RSD)小于5.4%(镉元素除外),满足了DZ/G 0130-2006质量控制要求。

关键词: 超细固体悬浮液, 气动雾化器, 电感耦合等离子体质谱法, 土壤, 微量元素

Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling

KEY WORDS: ultrafine solid suspension, pneumatic atomizer, Inductively Coupled Plasma-Mass Spectrometry, soil, trace elements

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超细固体悬浮液进样-电感耦合等离子体质谱法测定土壤中的微量元素

张莉娟, 徐铁民, 方蓬达, 魏双