Standard methods have been applied for the analysis of pesticides, namely diazinon, azinphos-methyl, pirimicarb, methidathion, ethion and phosalone, used most frequently in the Elazig region. In order to find out the rates of degradation of pesticides on vegetables and fruit, the residues were analysed under native field conditions over a period of time. The effects of washing and peeling on the pesticide residue levels in fruits and vegetables were investigated. In addition, the effects of sunlight, volatilization and micro-organisms on the disappearance and fate of pesticide residues in the products were also studied in relation to time.

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Only a few investigations on the composition of Anatolian copper and copper alloys have been carried out. Esin (1967) published analyses of 750 copper artifacts excavated from different Anatolian prehistoric sites and found that 600 of them were made of copper alloys containing deliberate quantities (i.e. more than 1%) of arsenic, lead or tin. Of these, 50% contain As between 1–6%, 25% As 1–3% and Sn 1–10% together, 20% Sn only (2–10%) and the remaining 5% Pb and/or Sn, As. The results of these analyses show that prehistoric Anatolian artifacts which are made of copper alloys have closely similar composition to Egyptian (Hedges, 1979) and Greek (Craddock, 1977) ones or at least their production technology appears to be the same. It is well known that As was added to copper around the third millennium B.C. by prehistoric metallurgists and Sn by the second millennium B.C.The metal objects whose analyses are reported below were all found in the İkiztepe excavation during 1978 and 1979 (Alkım, 1979). İkiztepe was located on the shore of the Black Sea and Kızılırmak (Red River) during the prehistoric ages, though today it is 60 km. away from the Black Sea. It was the largest occupation site around Samsun and consisted of four different natural hüyüks. Two hüyüks numbered İkiztepe I and II have been excavated to date.

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