Determination of Para-Phenylenediamine (PPD) in Henna Samples Collected from Libyan Local Markets Using Spectrophotometric Method. JAZU. 2024;13(50):527-538. تاريخ الوصول يونيو 30, 2025. https://palevioletred-snail-856794.hostingersite.com/index.php/azujournal/article/view/281