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  • Intake estimates of phthalate esters for South Delhi population based on exposure media assessment.

Intake estimates of phthalate esters for South Delhi population based on exposure media assessment.

Environmental pollution (Barking, Essex : 1987) (2014-03-25)
Mihir Tanay Das, Pooja Ghosh, Indu Shekhar Thakur
ABSTRACT

An indirect estimation method was followed to derive exposure levels of fifteen phthalate congeners in urban population of Delhi, India. The exposure media samples were collected from Jawaharlal Nehru University (JNU) campus and Okhla industrial area. GC-MS analysis of the samples indicated di(2-ethylhexyl) phthalate (DEHP) to be the most abundant congener and its estimated total daily intake level reached upto 70 μg kg(-1) d(-1). Out of the studied congeners, intake doses for di-n-butyl phthalate (DnBP) and DEHP, reached levels near or above the established exposure limit. In JNU, DEHP, dimethyl phthalate (DMP) and butyl benzyl phthalate (BBP) had 69% share in combined daily intake of Σ15 phthalates (CDI15); whereas, in Okhla, DEHP, diethyl phthalate (DEP), diisobutyl phthalate (DIBP), DnBP and DMP shared 64% of the CDI15. Food was found to be the major source of exposure contributing 67% and 74% of the estimated CDI15 at JNU and Okhla respectively.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Diisobutyl phthalate, 99%
Sigma-Aldrich
Phthalic acid, puriss. p.a., ≥99.5% (T)
Supelco
Benzyl butyl phthalate, analytical standard
Sigma-Aldrich
Dibutyl phthalate, 99%
Sigma-Aldrich
Dimethyl phthalate, ≥99%
Sigma-Aldrich
Benzyl butyl phthalate, 98%
Sigma-Aldrich
Phthalic acid, reagent grade, 98%
Sigma-Aldrich
Phthalic acid, ACS reagent, ≥99.5%
Sigma-Aldrich
Dimethyl phthalate, ≥99%
Supelco
Di-n-butyl phthalate solution, certified reference material, 5000 μg/mL in methanol
Supelco
Density Standard 1191 kg/m3, H&D Fitzgerald Ltd. Quality
Supelco
Diisobutyl phthalate, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Phthalic acid, European Pharmacopoeia (EP) Reference Standard
Supelco
Phthalic acid, analytical standard
Supelco
Benzyl butyl phthalate, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Supelco
Dibutyl phthalate, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Dibutyl phthalate, European Pharmacopoeia (EP) Reference Standard
Supelco
Dibutyl phthalate, PESTANAL®, analytical standard
Supelco
Dimethyl phthalate, PESTANAL®, analytical standard
Supelco
Potassium phthalate monobasic, reference material for titrimetry, certified by BAM, ≥99.5%
Sigma-Aldrich
Potassium phthalate monobasic, puriss. p.a., ≥99.5% (T)
Supelco
Diethyl phthalate, PESTANAL®, analytical standard
Sigma-Aldrich
Potassium phthalate monobasic, ACS reagent, acidimetric standard
Sigma-Aldrich
Phthalic acid dipotassium salt, 98%
Sigma-Aldrich
Potassium phthalate monobasic, BioUltra, ≥99.5% (T)
Sigma-Aldrich
Potassium hydrogen phthalate, BioXtra, ≥99.95%
Supelco
Potassium phthalate monobasic, Standard for quantitative NMR, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Diethyl phthalate, European Pharmacopoeia (EP) Reference Standard
Sigma-Aldrich
Diethyl phthalate, ≥99%
Sigma-Aldrich
Diethyl phthalate, 99.5%