Azah Yusof, Nor, and Musa Ahmad. “Direct Photometric Determination of Lead by Manual and Flow Injection Methods With Gallocyanine”. Asian Journal of Chemistry 21, no. 8 (March 30, 2010): 6190–6198. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/12305.