Tea For Tea

DISCUSSION
Copper (Cu) is one of the micronutrient in tea that can be observe by using Atomic Absorption Spectroscopy (AAS). In AAS, the way of the substance was analyzed is by starting the substances decomposed into atoms in a flame, furnace and plasma. Atoms in the form of atomic vapor are created in flame. There is an atomization process occur, which is the portion are excited to the higher energy level and return to the ground state by emitting photons. The element measured by absorption or emission of ultraviolet or visible radiation of the gaseous atom. AAS able to distinguish one element from one another in complex sample by performing simultaneous multi-element analysis and the analyte is measured in part per million to part per trillion. This related to Beer’s Law. Generally, Beer 's Law is the linear relationship between absorbance and

In order to prepare the Cu+2 standard solutions for AAS using the 1000ppm solutions for points in the standard solutions of each, which are commercially available. 1 ml stock solution of Ca+2 at 1000 mg/L in 0.5 M HNO3 was diluted in 100ml eluent. Serial dilution was prepared for 0, 1, 3, 5, and 10ppm. Then the standard curve was obtained by using AAS. The equation obtain is y=0.0077x+0.0204, this equation is used to get the Y-value for each sample. Then, the 2 types of different tea, with 10% of moisture content are prepare sample solution by weighing each for 1g. The weighed tea dust then dissolved in 100ml of hot water for a while and the another 150ml of distilled water was added. This give in total of the tea dust dilute in 250ml of distilled water. Next, 10ml of each sample was taken, inserted into 50ml volumetric flask and filling to the mark with 0.1M HNO3. The last step is observing each sample using AAS to obtain the Cu