%0 Journal Article
%T Developing a guideline for measuring the total number concentration of engineering nanomaterials in workplaces in China.
%A Gao X
%A Zou H
%A Xu X
%A Zhou L
%A Tang S
%A Yuan W
%A Zhang M
%J J Occup Health
%V 61
%N 2
%D Mar 2019
%M 30790393
%F 2.57
%R 10.1002/1348-9585.12044
%X <B>OBJECTIVE: </B>To provide a guideline for assessing the occupational exposure to nanomaterials in workplaces in China.<BR><B>METHODS: </B>Based on the basic requirement for the sampling of harmful substances, condensation particle counter/optical particle counter (CPC/OPC) was selected as the tool and the total number concentration (TNC) was used as an index to measure engineering nanomaterials in workplaces.<BR><B>RESULTS: </B>The strategy included instrument preparation, identification of particle-emission source, particle-property analysis, measurement of background concentration, concentration measurement based on working activity, concentration calculation and analysis, and recording of measurements.<BR><B>CONCLUSIONS: </B>The draft guideline based on traditional industrial hygiene practices can be used to identify the emission source of nanomaterials, qualitatively and quantitatively assess exposure to nanomaterials in workplaces.