Article History
Received: 30 July 2019
Revised: 15 August 2019
Accepted: 26 August 2019
First Online: 14 October 2019
Compliance with ethical standards
: The Certified Reference Material for arsenic speciation analysis in urine (GBW09115) was obtained from the National Standard Substances Centre in China, and this study did not involve any animal or human participants. The authors declare that all experiments were performed in accordance with the relevant laws and ethical standards.
: The authors declare that they have no competing interests.