vi
ANALISIS KALSIUM DAN MAGNESIUM DALAM AIR MINUM DARI MATA AIR DI KECAMATAN GUNUNG SITEMBER SECARA
SPEKTROFOTOMETRI SERAPAN ATOM ABSTRAK
Mineral yang terkandung dalam air minum memiliki pengaruh terhadap kesehatan tubuh. Menurut (World Health Organization) WHO, kadar kalsium dalam air minum minimal 20 mg/l dan magnesium 10 mg/l, sedangkan Meskes RI No.01/Birhukmas/I/1975 hanya memberikan persyaratan maksimal kalsium dan magnesium yang dianjurkan dalam air minum 75 mg/l dan 30 mg/l. Jadi, penelitian ini bertujuan untuk mengetahui kandungan kadar kalsium dan magnesium pada air minum dari mata air di Kecamatan Gunung Sitember secara spektrofotometri serapan atom.
Sampel yang digunakan diambil dari air minum sebelum dan sesudah dididihkan. Identifikasi kalsium dilakukan dengan menggunakan pereaksi larutan asam sulfat 1N ditambahkan etanol 96%. Identifikasi magnesium dilakukan dengan menggunakan pereaksi larutan kuning titan 0,1 % b/v ditambahkan NaOH 2N. Analisis kuantitatif kalsium dan magnesium menggunakan spektrofotometer serapan atom nyala udara-asetilen, diukur pada panjang gelombang berturut-turut 422,7 nm dan 285,20 nm.
Dari hasil penelitian menunjukkan kadar kalsium dalam air minum sebelum dan sesudah dididihkan berturut-turut yaitu 62,8692 ± 1,2838 mg/l dan 2,0192 ± 0,0323 mg/l, magnesium masing-masing yaitu 14,8746 ± 0,1923 mg/l dan 0,5035 ± 0,0147 mg/l. Kadar kalsium dan magnesium dalam air minum sebelum dididihkan memenuhi persyaratan WHO dan Meskes RI No.01/Birhukmas/I/1975. Sedangkan kadar kalsium dan magnesium sesudah dididihkan hanya memenuhi persyaratan Meskes RI No.01/Birhukmas/I/1975 tetapi belum memenuhi persyaratan WHO.
vii
ANALYSIS OF CALCIUM AND MAGNESIUM IN DRINKING WATER OF SPRING WATER IN THE DISTRICT GUNUNG SITEMBER WITH
ATOMIC ABSORPTION SPECTROPHOTOMETRY ABSTRACT
Minerals contained in the water has an influence to the health of the body. According to (World Health Organization) WHO, the levels of calcium in the drinking water is 20 mg/l and magnesium is 10 mg/l, while Meskes RI No.01/Birhukmas/I/1975 only give a maximum requirement of calcium and magnesium in drinking water is 75 mg/l and 30 mg/l. So, the aim of this study is to determine the levels of calcium and magnesium in drinking water from spring water in the district of Gunung Sitember by atomic absorption spectrophotometry.
The samples used were taken from drinking water before and after boiled. Identification of calcium done by using the reagent solution of sulfuric acid 1N added ethanol 96%. Identification of magnesium done by using titan yellow reagent solution 0.1% w/v added NaOH 2N. Quantitative analysis of calcium and magnesium using atomic absorption spectrophotometer air-acetylene flame, measured at a wavelength of 422.7 nm respectively and 285.20 nm.
The results showed the levels of calcium in drinking water before and after the row that boiled is 62.8692 ± 1.2838 mg/l and 2.0192 ± 0.0323 mg/l, each magnesium is 14.8746 ± 0.1923 mg/l and 0.5035 ± 0.0147 mg/l. Levels of calcium and magnesium in drinking water before boiling meets the requirements of the WHO and Meskes RI No.01/Birhukmas/I/1975. While the levels of calcium and magnesium after boiling only eligible Meskes RI No.01/Birhukmas/I/1975 but do not meet the requirements of the WHO.
