Micro gas preconcentrator using metal organic framework embedded metal foam for detection of low-concentration volatile organic compounds

•VOCs analysis is essential for environmental monitoring and hazardous gas detection.•Preconcentration is needed to overcome LOD of sensor due to low-concentration VOCs.•MOF embedded metal foam (MOFM) was synthesized as a gas adsorbent material.•Micro preconcentrator (μ-PC) packed with MOFM was developed for preconcentration.•MOFM-packed μ-PC had high preconcentration performance and low-pressure drop. [Display omitted] Analysis of volatile organic compounds (VOCs) is essential for on-site environmental monitoring and toxic chemicals detection. However, quantitatively detecting VOC gases is difficult because of their low gas concentration (