Institutional Repository | Satya Wacana Christian University: Karakterisan dan Komposisi Kimia Minyak Biji Semangka (Citrulus lanatus L) Varietas Sengkaling

1

KARAKTERISASI DAN KOMPOSISI KIMIA MINYAK BIJI SEMANGKA

(Citrulus lanatus L) VARIETAS SENGKALING

CHARACTERIZATION AND CHEMICAL COMPOSITION OF

WATERMELON (Citrulus lanatus L) VAR. SENGKALING SEED OIL

Purwasiwi Wahyu Ariani

*

, Hartati Soetjipto

**

, dan Silvia Andini

**

*

Mahasiswa Program Studi Kimia Fakultas Sains dan Matematika

**

Dosen Program Studi Kimia Fakultas Sains dan Matematika

Universitas Kristen Satya Wacana, Salatiga

Jln. Diponegoro no 52-60 Salatiga 50711 Jawa Tengah

–

Indonesia

652011007@student.uksw.edu

ABSTRACT

The objectives of the research are:

Firstly,

to determine the optimal yield of

watermelon (Citrulus lanatus L) seed oil revealed by the length of extraction time.

Secondly, to

characterize the physico-chemical characteristic of watermelon seed oil.

Thirdly, to

identification of chemical composition of watermelon seed oil was done using

Gas Chromatography-Mass Spectrometry (GC-MS). The extraction time had been done

in between 10 until 20 hours using n-hexane as the solvent. Data of yield and

physico-chemical of watermelon seed oil were analyzed by Randomized Completely Block

Design (RCBD), 6 treatments and 4 replications. As the treatment is the extraction time

which are (10; 12; 14; 16; 18; and 20 hours, respectively) and as the group is the time

analysis. The result of the study shows that the length of time extraction of watermelon

seed oil optimal at 18 hours is 16,79 ± 0,82 %. Long time extraction effect on yield,

moisture content of oil, density, peroxide and saponification value. The contrary, there

is no effect on the acid value of watermelon seed oil. GCMS analysis result, the

watermelon seed oil ingredients content of 3 chemical components, they are

9,12-octadecadienoic acid 75,71%, hexadecanoic acid 18,10%, and octadecanoic acid

6,19%.