Composite of sodium metavanadate (NaVO₃) and polyaniline (PANI) was formed by in-situ chemical polymerization in one step. Characterization techniques such as X-Ray diffraction, Scanning electron micrograph, and Fourier transform infra-red spectra confirm mixed phase of formation NaVO₃inPANI emeraldine salt. Conductivity decreases with an increase in wt of NaVO₃in PANI, the conductivity increases with temperature is due to an increase in disorderliness, induction of conformational changes within the composite, and thermally activated exponential behavior. The composites have shown high sensitivity in the low humidity range with the decrease in electrical resistance when exposed to humidity in the range of 20 to 50% RH. The moisture absorption is due to capillary condensation within the composite, which decreases the conductivity of the matrix with humidity. The transfer of charges from sensing material to analyte gas (donor) by penetration with enlargement of the polymer composites decreases the conductivity with the concentration of LPG.

通过原位化学聚合一步形成偏钒酸钠（NaVO ₃）和聚苯胺（PANI）的复合物。X 射线衍射、扫描电子显微照片和傅立叶变换红外光谱等表征技术证实了在PANI 翡翠盐中形成NaVO _{3 的}混合相。电导率随着 NaVO ₃重量的增加而降低在 PANI 中，电导率随温度增加是由于无序性增加、复合材料内构象变化的诱导以及热激活指数行为。复合材料在低湿度范围内表现出高灵敏度，当暴露在 20% 至 50% RH 的湿度范围内时，电阻会降低。吸湿是由于复合材料内的毛细管冷凝造成的，这会降低基质随湿度的导电性。随着聚合物复合材料的增大，电荷从传感材料到分析物气体（供体）的转移会随着 LPG 浓度的增加而降低电导率。