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ANALISIS PERBANDINGAN KADAR KALIUM PADA DAUN
KUMIS KUCING, DAUN PEGAGAN DAN DAUN SALAM
SECARA SPEKTROFOTOMETRI SERAPAN ATOM
ABSTRAK
Tanaman daun kumis kucing, daun pegagan dan daun salam secara empiris telah digunakan oleh masyarakat Tanah Jawa Kabupaten Simalungun untuk mengobati hipertensi. Ketiga tanaman ini bagi penderita hipertensi baik digunakan untuk menstabilkan mineral kalium dalam tubuh. Masing-masing tanaman ini memiliki suku berbeda, kumis kucing suku Lamiaceae, daun pegagan suku Apiaceae dan daun salam suku Myrtaceae. Tujuan dari penelitian ini adalah untuk menentukan kadar kalium dan melihat perbedaan kadar kalium yang terkandung dalam daun kumis kucing, daun pegagan dan daun salam.
Metode penelitian yang dilakukan meliputi pengambilan sampel daun kumis kucing, daun pegagan dan daun salam secara purposif di daerah Tanah Jawa Kabupaten Simalungun, lalu dilakukan destruksi kering kemudian dilakukan analisis kualitatif dan kuantitatif. Analisis kualitatif dilakukan dengan uji nyala Ni/Cr dan uji Kristal kalium dengan asam pikrat. Analisis kuantitatif dilakukan secara spektrofotometri serapan atom dengan menggunakan nyala udara-asetilen pada panjang gelombang 766,5 nm.
Hasil penetapan kadar kalium pada daun kumis kucing, daun pegagan dan daun salam masing-masing secara berurutan adalah (611,2501 ± 1,3393) mg/100g, (496,9701 ± 0,9422) mg/100g, (326,3965 ± 0,9174) mg/100g. Dari validasi metode yang dilakukan didapat LOD 0,3934 dan LOQ 1,3113. Hasil uji akurasi sebesar 91,67% dengan uji presisi 0,32%. Berdasarkan hasil analisis statistik ANOVA dengan uji tukey terdapat perbedaan yang signifikan kadar kalium pada daun kumis kucing, daun pegagan dan daun salam dengan kadar kalium paling tinggi terdapat pada daun kumis kucing.
vii
AN ANALYSIS COMPARISON OF POTASSIUM RATE IN
ORTHOSIPHON ARISTATUS (BLUME) MIQ, CENTELLA
ASIATICA (L) URB AND SYZYGIUM POLYANTHUM
(WIGHT) WALP LEAVES BY ATOMIC ABSORPTION
SPECTROPHOTOMETRY
The Orthosiphon aristatus (Blume) Miq, Centella asiatica (L) Urb and Syzygium Polyanthum (Wight) Walp Leaves empirically has been adopted by local community for treatment of hypertension in Tanah Jawa district Simalungun. These three herbals are recognized healing to hypertension patients mainly to stabilize mineral potassium in body. The plant has own group, since Orthosiphon aristatus (Blume) Miq into lamiaceae, Centella asiatica (L) Urb into Apiaceae and Syzygium Polyanthum (Wight) Walp into Myrtaceae. The objective of this study is to determine the content of potassium and to know the difference of potassium content existed in Orthosiphon aristatus (Blume) Miq, Centella asiatica (L) Urb and Syzygium Polyanthum (Wight) Walp leaves.
This study is purposive research, involved the sample of Orthosiphon aristatus (Blume) Miq, Centella asiatica (L) Urb and Syzygium Polyanthum (Wight) Walp leaves taken on Tanah Jawa district Simalungun, done in field by dried destructive thence made in qualitative and quantitative analysis. Analysis qualitative done with flame test Ni/Cr and crsystal of potassium test with picric acid. The qualitative analysis was done by atomic absorption spectrophotometry was usage in asetilene-air flame in a wave length 766,5 nm.
The main point of potassium content on the Orthosiphon aristatus (Blume) Miq, Centella asiatica (L) Urb and Syzygium Polyanthum (Wight) Walp leaves respectively ranged of (611.2501 ± 1.3393) mg/100 gr, (496.9701 ± 0.9422) mg/100 gr, (326.3965 ± 0.9174) mg/100 gr. By validation method has been done obtainable LOD 0.3934 and LOQ 1.3113. The result of accurate rate of 91.67% with precision test 0.32%. Based on a statistic analysis of ANOVA with tukey test found a significant difference of potassium content on theOrthosiphon aristatus (Blume) Miq, Centella asiatica (L) Urb and Syzygium Polyanthum (Wight) Walp leaves with the highest content is on Orthosiphon aristatus (Blume) Miq.
