Application of Polyhydroxybutyrate-b-polyethyleneglycol (a block co-polymer) for Solid Phase Extraction of Lead and Copper in Different Food Samples. Pak. J. Anal. Environ. Chem. [Internet]. 2014 Jun. 30 [cited 2025 Jul. 12];15(1):66-73. Available from: http://pjaec.pk/index.php/pjaec/article/view/344