F. T. U. Tahir Umar and Abubakar Lawal, “REVIEW OF RECENT SAMPLE PREPARATION METHODS FOR THE ANALYSIS OF AZO DYES IN FOODS AND DRINKS: A COMPARISON OF SOLID-PHASE EXTRACTION AND QuEChERS”, FJS, vol. 9, no. 12, pp. 81–90, Nov. 2025, doi: 10.33003/fjs-2025-0912-4106.