Dietary exposure and risk assessment of phthalic acid esters through a total diet study in Shenzhen, South China

Abstract

Phthalic acid esters (PAEs) are typical endocrine disruptors which are ubiquitous contaminants. Human exposure to PAEs is through multiple routes of which the diet is recognised as the main source of daily intake. The aim of this study was to evaluate the dietary exposure to PAEs of residents in Shenzhen (China) through a total diet study and assess the potential health risk. A total of 16 different phthalate esters in samples of 12 composite food groups were determined by GC–MS. The main dietary sources of PAE exposure among adult residents in Shenzhen were potatoes (21%), eggs (21%), meat (15%) and aquatic products (14%). The median total dietary exposure to PAEs in Shenzhen residents was 7780 ng kg⁻¹ bw d⁻¹, and the hazard quotients (HQ) of dimethyl phthalate (DMP), diethyl phthalate (DEP), di-isobutyl phthalate (DIBP), dibutyl phthalate (DBP) and di-2-ethylhexyl phthalate (DEHP) were 0.09, 0.06, 0.07, 0.10 and 0.03, respectively. Therefore, the risks from dietary PAE exposure were low. However, with the increasing use of PAEs and their accumulation in the environment, the probability of PAEs entering the food chain is gradually increasing and, therefore, PAEs should be strictly controlled and regularly monitored.

Keywords:

• Phthalate esters
• total diet study
• dietary exposure

Acknowledgements

This study was supported by the National Key Research and Development Program of China (2017YFC1601702) and the Special Program for Risk Assessment of Agri-products Quality and Safety of the Ministry of Agriculture and Rural Affairs (GJFP2019038), the authors thank Editage (www.editage.cn) for the English polishing.

Disclosure statement

The authors declare no competing interests.

Additional information

Funding

This study was supported by the National Key Research and Development Program of China [2017YFC1601702] and the Special Program for Risk Assessment of Agri-products Quality and Safety of the Ministry of Agriculture and Rural Affairs [GJFP2019038].