Pengaruh Perendaman Dalam Air Hangat Terhadap Kandungan Formalin Pada Mie Basah Dari Tiga Produsen Yang Dijual Di Pasar Johar Semarang

It is assumed that the use of formalin in fresh noddles is still relatively high since its use not only prolongs the market life of the noddles but also make them tougher, brighter and non-adhesive. This research was intended to (1) analyze the presence of formalin in fresh noddles, (2) find out the levels of formalin contained in fresh noddles produced by three producers and sold in Johar Market, Semarang City and (3) find out the effects of bathing the noddles in warm water on the formalin contents.This was an experimental research with descriptive analyses. Employing a convenient sampling technique, the samples for this research were taken from the noddles produced by three producers and sold at Johar Market, Semarang City. To test the presence of formalin in the noddles, a chromatropatory-acid method was used. The samples containing formalin were analyzed using a spectrophotometer at an A of 569 nm. The samples were bathed for 15 minutes at temperatures of 40° C and 50° C. The effects of the bathing were analyzed by comparing the formalin contents before and after the bathingThe analyses showed that the fresh noddles produced by Kaligawe, Boja and Lamper producers contained 230,749 ± 18,092 mg/kg, 271,749 ± 18,088 mg/kg and 250,999 ± 18,090 mg/kg respectively. The comparison of the formalin contents before and after the bathing at 40° C showed significant differences. The comparison of the formalin contents before and after the bathing at 50° C also showed significant differences. The comparison of the formalin contents after the bathing at 40° C and 40° C also showed significant differences; the 40° C bathing reduced 39.77% of the formalin content, while the 50° C bathing reduced 65.42%

Analisis Kandungan Boraks Sebagai Boron Pada Gendar Yang Diproduksi Oleh Industri Rumah Tangga Di Daerah Ambarawa

Gendar is a type of food produced by adding bleng, which is a chemical compound containing borax asboros. This research was intended to find out (1) the borax contents in the gendar taken from Ambarawa areas and(2) whether there were significant differences in borax levels contained in fresh gendar, dry gendar, gendar fried infresh vegetable oil and gendar fried in used vegetable oil.This was a non-experimental research with the data analyzed descriptively and analytically. The variablesmeasured were borax levels, acting is boros, contained in fresh gendar, dry gendar, gendar fried in fresh vegetableoil and gendar fried in used vegetable oil. The samples for this research were taken randomly from three householdindustried of gendar in Ambarawa areas. The contents of borax were measured using spectrophotometri UV-Vis.The analyses on the borax content in the four types of gendars (fresh gendar, dry gendar, gendar fried in freshvegetable oil and gendar fried in used vegetable oil) used Kruskall-Wallis non-parametric statistical tests followedby Mann-Whitney tests.The analyses showed that all of the four types of gendars really contained borax, as boros, but in diffirentlevels among the diffirent gendars borax contents in the four different gendars taken from Bandungan andSumowono had significant values 0,182 and 0,643 respectively (P > 0,05), contents in the four different gendarstaken from Ambarawa areas also had a significant value of 0,004 (P < 0,05), meaning also that there werestatistically significant differences in the borax contents

Metode RPTLC dan Optimasi Fase Gerak Dalam Penetapan Harga Rm Sebagai Salah Satu Parameter Lipofilisitas Dalam Rancangan Obat

RPTLC and optimizing mobile phase methods in Rm value determination as one of lipophylicity parameters in drug design Background: The early process to successfully achieve its target is drug penetration or absorption. Of the three physicochemical parameters i.e, lipophyllicity, electronic and steric parameters, the lipophyllicity parameter is the most reponsible in drug absorption process. The research was aimed to determine retention modified (Rm) value of barbituric acid compound derivatives using RPTLC metod and mobile phase optimizing. Methods: This study was conducted on barbituric acid compound derivatives by using reverse phase thin layer chromatography (RPTLC). Silica Gel GF 254 that had been submerget in the mixture of liquid paraffin and petroleum eter (95:5) was used as a stationary phase. The mixture of polar to non polar solvent was used as mobile phase. Results: Research showed that in this method the most optimum of mobile phase was indicated by methanol and acetic acid mixture in the ratio of (1:9). The resulted Rm values of 5,5-diethylbarbituric acid, 5,5-diallylbarbituric acid, 5-allyl-5-isopropylbarbituric acid, 5-allyl-5-isobuthylbarbituric acid, 5-etil-5-(1-methylbutyl) barbituric acid, 5-(1-cyclohexene-1-yl)-1,5-dimethylbarbituric acid and 5-ethyl-5-phenylbarbituric acid were as follow 0.116; 0.144; 0.162; 0.221; 0.262; 0.187 and 0.199. Conclusions: The most optimum mobile phase in this method was the mixed solvents that had lower polarity, i.e, the mix of methanol and acetic acid in the ratio of (1:9). The H1 , H2 and H3 substituens in barbituric acid nuclei showed, the longer carbon chain, the higher the Rm values, howover the existing of double bond in such substituents will decrease the Rm value