Comparison of Simultaneous Quantitative Analysis of Methylmercury and Inorganic Mercury in Cord Blood Using LC-ICP-MS and LC-CVAFS: The Pilot Study of the Japan Environment and Children's Study.
CVAFS
ICP-MS
blood
cohort study
inorganic mercury
mercury
mercury speciation
methylmercury
Journal
Toxics
ISSN: 2305-6304
Titre abrégé: Toxics
Pays: Switzerland
ID NLM: 101639637
Informations de publication
Date de publication:
09 Apr 2021
09 Apr 2021
Historique:
received:
16
03
2021
revised:
01
04
2021
accepted:
06
04
2021
entrez:
30
4
2021
pubmed:
1
5
2021
medline:
1
5
2021
Statut:
epublish
Résumé
Prenatal exposure to methylmercury (MeHg) affects child development after birth. However, many epidemiological studies have evaluated total mercury levels without analyzing speciation. Biomonitoring of MeHg and inorganic mercury (IHg) is essential to reveal each exposure level. In this study, we compared a high-throughput analysis for mercury speciation in blood using liquid chromatography-inductively coupled plasma-mass spectrometry (LC-ICP-MS) and liquid chromatography-cold vapor atomic fluorescence spectrometry (LC-CVAFS). The validated LC-ICP-MS method was applied to 101 maternal blood and 366 cord blood samples in the pilot study of the Japan Environment and Children's Study (JECS). The accuracy of the LC-CVAFS method ranged 90-115% determined by reference material analysis. To evaluate the reliability of 366 cord blood samples, fifty cord blood samples were randomly selected and analyzed using LC-CVAFS. The median (5th-95th percentile) concentrations of MeHg and IHg were 5.4 (1.9-15) and 0.33 (0.12-0.86) ng/mL, respectively, in maternal blood, and 6.3 (2.5-15) and 0.21 (0.08-0.49) ng/mL, respectively, in cord blood. Inter-laboratory comparison showed a relatively good agreement between LC-ICP-MS and LC-CVAFS. The median cord blood:maternal blood ratios of MeHg and IHg were 1.3 and 0.5, respectively. By analyzing speciation, we could focus on the health effects of each chemical form.
Identifiants
pubmed: 33918897
pii: toxics9040082
doi: 10.3390/toxics9040082
pmc: PMC8069649
pii:
doi:
Types de publication
Journal Article
Langues
eng
Subventions
Organisme : National Institute for Environmental Studies
ID : Not applicable
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