The system response reaches stability after 25 s of measurement. The sensitivity of the Pb2+ ISE obtained is 27.25 mV/decade with a linear range of of 10−10–10−5 M and a coefficient of determination (R2) of 0.959. This research has successfully fabricated ion selective electrode (ISE) for Pb2+ using castor oil (Ricinus communis L.)-based polyurethane (PU) membrane with 1,10‒phenanthroline as the active agent. The first finding explains that the Profitability Ratio has a negative effect on Sustainability, the second finding explains that the Activity Ratio does not have a positive effect on Sustainability, the third finding explains that the company size has a positive effect on Sustainability, the fourth finding explains that the audit committee has a negative effect on Sustainability, while the fifth finding explains that board of directors doesn’t have a positive effect on Sustainability. One of the regression completion procedures with a high level of flexibility in research that connects theory, concepts, and data that can be done on research variables is used in this study’s data analysis method: Regression Ordinary Least Square, Fixed Effects, Random Effects, Robust with Stata Software. The data used in this study used panel data. This study uses a quantitative approach with population and research samples using companies listed in the Jakarta Islamic Index in 2017–2021. This study aims to prove the consistency of Agency Theory as a solution to explain the role of the influence of Profitability Ratio, Activity, company size, audit committee and Board of Directors on Sustainability.
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