South Korea has bought 1,000 tonnes of copper and 200 tonnes of tin for April arrival via tenders closed on Feb. 6, the state-run Public Procurement Service said on its website (www.g2b.go.kr). Details of the purchases are as follows: Copper TONNES SUPPLIER PREMIUM(CIF/T) ORIGIN 1,000 LS-Nikko Copper Inc $167 South Korea   * Note: The copper product will arrive at the port of Incheon by April 15, 2014. The above premiums were made over London Metal Exchange (LME) prices.  Tin TONNES SUPPLIER PREMIUM(CIF/T) ORIGIN 200 LG International Corp $397 Thailand   *Note: The tin product will arrive at the port of Incheon by April 30, 2014. The above premiums were made over London Metal Exchange (LME) prices.