“IDENTIFICATION AND DETERMINATION OF CAFFEINE CONTENT IN BUTONG TEA AND BLACK TEA USING SOXHLET EXTRACTION AND TLC: IDENTIFIKASI DAN PENETAPAN KADAR KAFEIN TEH BUTONG DAN BLACK TEA DENGAN SOXHLETASI SERTA KLT”, fj, vol. 6, no. 02, pp. 602–607, July 2026, doi: 10.51771/fj.v6i02.2401.