Determination of inorganic mercury and methylmercury in Zooplankton and fish samples by speciated isotopic dilution GC-ICP-MS after alkaline digestion
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Determination of inorganic mercury and methylmercury in Zooplankton and fish samples by speciated isotopic dilution GC-ICP-MS after alkaline digestion. / Perna, Lorenzo; LaCroix-Fralish, Angela; Stürup, Stefan.
In: Journal of Analytical Atomic Spectrometry, Vol. 20, No. 3, 01.03.2005, p. 236-238.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Determination of inorganic mercury and methylmercury in Zooplankton and fish samples by speciated isotopic dilution GC-ICP-MS after alkaline digestion
AU - Perna, Lorenzo
AU - LaCroix-Fralish, Angela
AU - Stürup, Stefan
PY - 2005/3/1
Y1 - 2005/3/1
N2 - Species-specific isotope dilution (ID) in combination with gas chromatography-inductively coupled plasma-mass spectrometry (GC-ICP-MS) for separation and determination of methylmercury (MeHg) and inorganic mercury (Hg) in fish tissue and Zooplankton is described. Samples were digested with methanolic potassium hydroxide. Analytes were derivatized with sodium tetraethylborate and absorbed in an isooctane trap. ID analysis was performed using an enriched spike of 201Hg and a laboratory synthesized enriched spike of Me Hg. The precision of repeated measurements was always less than 5%. The absolute detection limits obtained with GC-ICP-MS for MeHg and Hg were 2.8 ng and 4.6 ng, respectively. Analytical precision was typically better than 5% over ten repeated measurements. The accuracy of the method has been validated with certified reference materials (DORM-2 and BCR 414). The total mercury concentration results of the real samples as well as the CRM have been compared with those obtained by cold vapor-high resolution ICP-MS using ID approach.
AB - Species-specific isotope dilution (ID) in combination with gas chromatography-inductively coupled plasma-mass spectrometry (GC-ICP-MS) for separation and determination of methylmercury (MeHg) and inorganic mercury (Hg) in fish tissue and Zooplankton is described. Samples were digested with methanolic potassium hydroxide. Analytes were derivatized with sodium tetraethylborate and absorbed in an isooctane trap. ID analysis was performed using an enriched spike of 201Hg and a laboratory synthesized enriched spike of Me Hg. The precision of repeated measurements was always less than 5%. The absolute detection limits obtained with GC-ICP-MS for MeHg and Hg were 2.8 ng and 4.6 ng, respectively. Analytical precision was typically better than 5% over ten repeated measurements. The accuracy of the method has been validated with certified reference materials (DORM-2 and BCR 414). The total mercury concentration results of the real samples as well as the CRM have been compared with those obtained by cold vapor-high resolution ICP-MS using ID approach.
UR - http://www.scopus.com/inward/record.url?scp=15244358478&partnerID=8YFLogxK
U2 - 10.1039/b410545a
DO - 10.1039/b410545a
M3 - Journal article
AN - SCOPUS:15244358478
VL - 20
SP - 236
EP - 238
JO - Journal of Analytical Atomic Spectrometry
JF - Journal of Analytical Atomic Spectrometry
SN - 0267-9477
IS - 3
ER -
ID: 199497472