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PENETAPAN KADAR MINERAL NATRIUM, KALIUM, DAN KALSIUM PADA DAUN GIRANG(Leea aequata L.) SECARA
SPEKTROFOTOMETRI SERAPAN ATOM
ABSTRAK
Girang (Leea aequata L.) adalah tumbuhan yang berasal dari famili Vitaceae. Tumbuhan ini banyak digunakan masyarakat karo sebagai obat luka, antitetanus, dan anti kejang. Pada umumnya tumbuhan mengandung mineral natrium, kalium, dan kalsiumyang berperan penting dalam mengatur kontraksi otot. Tujuan dari penelitian ini adalah untuk mengetahui kadar mineral natrium, kalium, dan kalsium pada daun girang.
Sampel yang digunakan dalam percobaan ini adalah daun girang muda dan daun girang tua. Preparasi sampel dilakukan melalui destruksi kering. Penetapan kadar dilakukan dengan menggunakan spektrofotometer serapan atom dengan nyala udara-asetilen. Analisis kuantitatif natrium (Na), kalium (K), dan kalsium (Ca) dilakukan pada panjang gelombang berturut-turut 589,0 nm, 766,5 nm, dan 422,7 nm. Keuntungan dari metode ini adalah selektif dan sensitif.
Hasil penelitian menunjukkan bahwa kadar mineral natrium, kalium, dan kalsium dalam daun girang muda adalah (79,9992± 0,8271) mg/100g; (631,0526± 1,1071) mg/100g dan (470,9033± 2,6521) mg/100g. Serta kadar mineral natrium, kalium, dan kalsium dalam daun girang tua adalah (75,1995±2,3334) mg/100g; (530,9961 ± 1,0173) mg/100g dan (1039,5513± 7,1164) mg/100g. Berdasarkan hasil uji statistik yaitu uji beda rata-rata kadar mineral antara daun girang muda dan daun girang tua, menunjukkan bahwa terdapat perbedaan yang signifikan kadar masing-masing mineral natrium, kalium, dan kalsium dengan tingkat kepercayaan 99%.
Kata kunci:daun girang (Leea aequata, L.),natrium, kalium, kalsium, spektrofotometer serapan atom
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DETERMINATION OF SODIUM, POTASSIUM, AND CALCIUM LEVELIN GIRANG LEAVES (Leea aequata L.)BY ATOMIC
ABSORPTION SPECTROPHOTOMETRY
ABSTRACT
Girang (Leea aequata, L.) is a local plant of the Vitaceae family. This plant is well used in the Karo community as wound healing, anti-tetanus, and anti convulsion. Generally, plant contain mineral sodium, potassium, and calcium which are the important mineral that regulate muscle contraction. The purpose of this study was to determine mineral content of sodium, potassium, and calcium,in the girang leaves.
The sample used in this study were younger girang leaves and older girang leaves. Sample preparation was done by dry destruction. The determination is conducted by using atomic absorption spectrophotometer with air-acetylene flame. Quantitative analysis of sodium (Na), potassium (K), and calcium (Ca) is perfomed at the 589.0 nm, 766.5 nm, and 422.7 nm wave length. The advantage of this method is selective and sensitive.
The results showed that the levels of the minerals sodium, potassium, and calcium in the younger girang leaves is (79.9992± 0.8271) mg/100g; (631.0526± 1.1071) mg/100g and (470.9033± 2.6521) mg/100g. As well as the levels of the minerals sodium, potassium, and calcium in the older girang leaves is (75.1995± 2.3334) mg/100g; (530.9961 ± 1.0173) mg/100g and (1039.5513± 7.1164) mg/100g. The results of statistical tests, test the difference of the mineral content average’s between the the younger girang leaves and the older girang leaves, show that there are significant differences of each mineral content of minerals sodium, potassium, and calcium between the younger girang leaves and the older girang leaves with a level of confidendince 99%.
Key word:girang(Leea aequata, L) leaves, sodium, potassium, calcium, atomic absorption spectrophotometry.
