We herein proposed a sample introduction technique based on solution cathode glow discharge(SCGD)of a portable design for inductively coupled plasma-optical emission spectrometry(ICP-OES)and its ap-plication in sensit...We herein proposed a sample introduction technique based on solution cathode glow discharge(SCGD)of a portable design for inductively coupled plasma-optical emission spectrometry(ICP-OES)and its ap-plication in sensitive determination of mercury.The products from SCGD containing mercury vapor,were transported by an Ar flow to ICP spectrometer for detection.A gas liquid separator(GLS)and a dryer were used to condense and remove most of the accompanying moisture,which greatly improved both the stability and sensitivity of the signal.The detection limit(DL)acquired by this developed method was 0.22μg/L(194.1 nm),which was nearly 82 times lower than that obtained by pneumatic nebuliza-tion(PN).The relative standard deviation(RSD)was 1.4%(n=14)for a 50μg/L standard.Blank solution(HNO_(3),pH 1)can effectively elute mercury residue.Its accuracy and practicality were also demonstrated by the determination of GBW10029(fish)certified reference material,shrimp,crawfish,soil and human hair samples.The results showed good consistency with the certified values and the values obtained us-ing inductively coupled plasma−mass spectrometry.展开更多
基金supported by the Instrument Development Project of the Chinese Academy of Sciences(No.YZ201539)the National Natural Science Foundation of China(No.21175145)the Shanghai Technical Platform for Testing and Characterization on Inorganic Materials(No.19DZ2290700).
文摘We herein proposed a sample introduction technique based on solution cathode glow discharge(SCGD)of a portable design for inductively coupled plasma-optical emission spectrometry(ICP-OES)and its ap-plication in sensitive determination of mercury.The products from SCGD containing mercury vapor,were transported by an Ar flow to ICP spectrometer for detection.A gas liquid separator(GLS)and a dryer were used to condense and remove most of the accompanying moisture,which greatly improved both the stability and sensitivity of the signal.The detection limit(DL)acquired by this developed method was 0.22μg/L(194.1 nm),which was nearly 82 times lower than that obtained by pneumatic nebuliza-tion(PN).The relative standard deviation(RSD)was 1.4%(n=14)for a 50μg/L standard.Blank solution(HNO_(3),pH 1)can effectively elute mercury residue.Its accuracy and practicality were also demonstrated by the determination of GBW10029(fish)certified reference material,shrimp,crawfish,soil and human hair samples.The results showed good consistency with the certified values and the values obtained us-ing inductively coupled plasma−mass spectrometry.
