Determination of metals in tap water using atomic absorption spectrometry : a case study in Bandar Sunway residential area

Metal contamination in water is a major component in the determination of water quality. Apparently, tap water qualities in many countries are affected by industrialization. The objective of this study was to detect metal concentration in tap water in the Bandar Sunway residential area. Tap water samples were collected from four different locations. The four sampling locations were Sunway University College, Sunway Villa Apartment, Sunway Condominium and PJS 7?11. Samples were analyzed using atomic absorption spectrometry to determine the concentration of dissolved metal. The metal analysis was done to detect zinc, cadmium, chromium, lead, magnesium, calcium and copper. The results obtained were compared with guidelines for drinking water quality such as the Environmental Protection Agency (EPA) and World Health Organization (WHO) guidelines. The study showed that the piping system which is over a decade old in the Sunway Villa Apartment affected levels of lead and copper in the water, but not zinc, cadmium, chromium, , magnesium and calcium

"Chem Twist" for secondary/tertiary level education

This study describes the effectiveness of “Chem Twist” in teaching and learning Chemistry at the secondary and tertiary level. “Chem Twist” is a multimedia game which enhances student’s engagement and their understanding on writing chemical formula. The objectives of this study are (i) to determine the relationship between student’s engagement and the designed multimedia game (ii) to determine students understanding on writing chemical formula. Visual basic network was used to design “Chem Twist”. “Chem twist” was designed to help students to adapt to all learning levels and help keep the classroom learning interactive and exciting. A Likert scale questionnaire is used to determine the relationship between student’s engagement and the designed multimedia game. Besides that, a set quiz questions is used to determine students understanding on the particular topic. The results will be discussed in the paper. The findings of this study provide further evidence in support of the significant effects of multimedia games on Chemistry students