ANALISIS MINERAL KALSIUM, KALIUM, DAN MAGNESIUM PADA BEBERAPA JENIS MINUM ISI ULANG DI KOTA MEDAN
Abstrak
Mineral yang terkandung dalam air memiliki pengaruh terhadap kesehatan tubuh. Penelitian ini bertujuan untuk mengetahui kandungan kadar kalsium, kalium, dan magnesium pada beberapa jenis air minum isi ulang di kota Medan.
Sampel yang digunakan adalah air minum isi ulang teknik filterisasi, air minum isi ulang teknik reverse osmosis, air minum isi ulang teknik reverse osmosis bermerek dan air minum mineral isi ulang bermerek sebagai pembanding. Identifikasi kalsium dilakukan dengan menggunakan pereaksi larutan amonium oksalat 6,3%, larutan asam sulfat 1N, serta uji nyala dengan kawat nikel krom. Identifikasi kalium dilakukan dengan menggunakan pereaksi asam pikrat 1% b/v serta uji nyala dengan kawat nikel krom. Identifikasi magnesium dilakukan dengan menggunakan pereaksi larutan kuning titan 0,1% serta basa natrium hidroksida. Analisis kuantitatif kalsium, kalium, dan magnesium menggunakan spektrofotometer serapan atom nyala udara-asetilen, dilakukan pada panjang gelombang berturut-turut 422,7 nm, 766,49 nm, dan 285,20 nm.
Hasil analisis menunjukkan air minum isi ulang teknik filterisasi mengandung kalsium yaitu 6,5114 mg/l sampai 14,3137 mg/l, kalium 4,9328 mg/l sampai 5,5339 mg/l, sedangkan magnesium 1,7817 mg/l sampai 3,1492 mg/l, dimana kadar tersebut masih dibawah kadar minimun kalsium dan magnesium yang ditetapkan yaitu 20 mg/l dan 10 mg/l. Air minum isi ulang teknik reverse osmosis mengandung kalsium, kalium, dan magnesium dengan kadar rendah, yaitu berturut-turut 0,5676 mg/l sampai 0,8181 mg/l; 0,5682 mg/l sampai 0,6705 mg/l; dan 0,0885 mg/l sampai 0,1667 mg/l. Air minum isi ulang teknik reverse osmosis bermerek mengandung kadar kalsium, kalium, dan magnesium yaitu 0,5676 mg/l; 0,5917 mg/l; dan 0,1484 mg/l. Sedangkan air minum mineral isi ulang bermerek mengandung kalsium, kalium, dan magnesium dengan kadar 8,0173 mg/l; 5,7013 mg/l; dan 5,6921 mg/l. Kadar tersebut juga masih dibawah kadar minimum yang ditetapkan. Sedangkan kadar kalium tidak memiliki batas minimum. Beberapa jenis air minum isi ulang mengandung kalsium,kalium,dan magnesium.
Kata kunci : air minum isi ulang, air reverse osmosis, kalsium, kalium, dan magnesium, analisis mineral.
Mineral Analysis Of Calsium, Potassium, And Magnesium In Some Kind Of Drinking Water From Refill In Medan
Abstract
Minerals contained in the water has an influence on the health of the body. This study aims to find out the contents of calcium, potassium, and magnesium in some kind of drinking water refill in Medan.
The samples used is drinking water from refill filtration technique, drinkng water from refill reverse osmosis technique, refill drinking water reverse osmosis technique branded and mineral water branded as a comparison. Identification of calcium performed using 6.3% ammonium oxalate reagent, 1N sulfuric acid, and flame test by using nickel chrome. Identification of potassium performed using 1% picric acid reagent and flame test by using nickel chrome. Identification of magnesium performed using titan yellow reagent and 0.1% sodium hydroxide. Quantitative analysis was done by atomic absorption spectrophotometer with acetylene-air flame. Calcium, potassium, and magnesium were quantitative analyzed at 422.7 nm, 766.49 nm, and 285.20 nm wavelength.
The analysis showed drinking water from refill filtration technique contains calcium which is 6.5114 mg/l to 14.3137 mg/l, potassium 4.9328 mg/L to 5.5339 mg/l, while the magnesium 1.7817 mg/l to 3.1492 mg/l, where the level is still below the minimum levels of calcium and magnesium were determined as 20 mg/l and 10 mg/l. Refill drinking water reverse osmosis technique contains calcium, potassium, and magnesium with lower levels, ie respectively 0.5676 mg/l to 0.8181 mg/l, 0.5682 mg/L to 0.6705 mg/l; and 0.0885 mg/l to 0.1667 mg/l. Refill drinking water reverse osmosis technique branded contain high levels of calcium, potassium, and magnesium is 0.5676 mg/l, 0.5917 mg/l and 0.1484 mg/l. While drinking water mineral refill branded containing calcium, potassium, and magnesium to levels of 8.0173 mg/l, 5.7013 mg/l and 5.6921 mg/l The levels are still well below the established minimum levels.. Whereas potassium levels have no minimum limit. Several types of refill drinking water contains calcium, potassium, and magnesium.
Key words : drinking water from refill, reverse osmosis water, calcium, potassium, and magnesium, mineral analysis.
