Peer Review The Development Model Analysis of Copper Using Vapor Heat By Formation Copper Hydride Compounds for HV AAS Method

The copper hydride is an intermediate hydride which decomposed to copper atom and hydrogen at temperature 110 o C. In the research, resulted copper atom is measured on heated open absorption cell. The copper hydride was formed by reduction of Copper (II) with hypophosporus acid 4% at temperature 80 o C. Sodium lauryl sulphate 0.01 M was used as a misel production to carry out copper hydride to absorption cell of hot vapour atomic absorption spectrometry (HV-AAS). The optimum condition of experiment were; 0.5 ml of H3PO2 4%, 805 o C of reaction temperature, 0.5 mL of sodium lauryl sulfat 0, 01 M, 605 second of formation time, and 15.35 cm long of glass a pipe. Argon or air for blowing was conducted at the base of flask reaction with 324.7 nm wave length measurement. The duration of measurement was  35 seconds. Regression equation of standard copper absorbance 5 to 30 mg/L was Y = 0, 026 + 0, 0091x. By using the equation, the characteristics of analytical procedure were found: 3.65 mg/L detection limit, 0.18 mg/L sensitivity. The accuration of the procedure is 1.41%, its precision 10.59%, repeatability is 3.79 at 10 mg/L concentration of solution and average value of confidence interval 95% was 9.86  0.8 mg/L or at range 9.1 to 10.7 mg/L. Linearity range standard of concentration is 5 to 25 mg/L (absorbance 0.088 to 0.258). The analysis procedure characteristics obtained with HV-AAS is less effective than flame atomic absorption spectrometry (FAAS) as its detection limit is 0.004 mg/L and its sensitivity is 0.03 mg/L. Keyword: flameless atomic absorption spectrometry, copper, copper hydride.