Evidence map›Paper›PMID 21830137›Full record

Trial reportAnalytical and bioanalytical chemistry2011

Analysis of the flame retardant metabolites bis(1,3-dichloro-2-propyl) phosphate (BDCPP) and diphenyl phosphate (DPP) in urine using liquid chromatography-tandem mass spectrometry.

E M Cooper, A Covaci, A L N van Nuijs, T F Webster, H M Stapleton

Open access · greenAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Analytical and bioanalytical chemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
6.1field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

67 citing papers in PubMed, 168 citations in OpenAlex.

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  12. The MAK collection for occupational health and safety · 2024
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7 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 2 countries.

E M CooperNicholas School of the Environment, Duke University, Durham, NC 27708, USA.
A Covaci
A L N van Nuijs
T F Webster
H M Stapleton
Duke University · USUniversity of Antwerp · BEBoston University · US

Funding

Children's Exposure to Flame Retardants: Effects on Thyroid Hormone RegulationR01ES016099 · NIEHS · DUKE UNIVERSITY · PI STAPLETON, HEATHER M · 2008 to 2017
$5.0M
Measuring Human Exposure to PBDEsR01ES015829 · NIEHS · BOSTON UNIVERSITY MEDICAL CAMPUS · PI WEBSTER, THOMAS F · 2008 to 2011
$1.8M
NIEHS NIH HHS R01 ES015829NIEHS NIH HHS R01ES015829NIEHS NIH HHS R01 ES016099NIEHS NIH HHS R01ES016099
6 · The paper itself

Abstract

Organophosphate triesters tris(1,3-dichloro-2-propyl) phosphate (TDCPP) and triphenyl phosphate are widely used flame retardants (FRs) present in many products common to human environments, yet understanding of human exposure and health effects of these compounds is limited. Monitoring urinary metabolites as biomarkers of exposure can be a valuable aid for improving this understanding; however, no previously published method exists for the analysis of the primary TDCPP metabolite, bis(1,3-dichloro-2-propyl) phosphate (BDCPP), in human urine. Here, we present a method to extract the metabolites BDCPP and diphenyl phosphate (DPP) in human urine using mixed-mode anion exchange solid phase extraction and mass-labeled internal standards with analysis by atmospheric pressure chemical ionization liquid chromatography tandem mass spectrometry. The method detection limit was 8 pg mL(-1) urine for BDCPP and 204 pg mL(-1) for DPP. Recoveries of analytes spiked into urine ranged from 82 ± 10% to 91 ± 4% for BDCPP and from 72 ± 12% to 76 ± 8% for DPP. Analysis of a small number of urine samples (n=9) randomly collected from non-occupationally exposed adults revealed the presence of both BDCPP and DPP in all samples. Non-normalized urinary concentrations ranged from 46-1,662 pg BDCPP mL(-1) to 287-7,443 pg DPP mL(-1), with geometric means of 147 pg BDCPP mL(-1) and 1,074 pg DPP mL(-1). Levels of DPP were higher than those of BDCPP in 89% of samples. The presented method is simple and sufficiently sensitive to detect these FR metabolites in humans and may be applied to future studies to increase our understanding of exposure to and potential health effects from FRs.

Indexed as

Chromatography, LiquidTandem Mass SpectrometryAdultFlame RetardantsHumansOrganophosphorus CompoundsFlame RetardantsOrganophosphorus Compounds

Identifiers

PMID21830137
PMCPMC3718013
OpenAlexW1970261048

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.