China's quality supervisor said Tuesday that it detected toxic chemicals in imported Japanese food for the second time in a week.

Tests conducted by the Tianjin Entry-Exit Inspection and Quarantine Bureau found arsenic in a Japanese-brand soy sauce at five times the allowable level, the General Administration of Quality Supervision, Inspection and Quarantine (GAQSIQ) said.

Arsenic is commonly used in agricultural insecticides and poisons.

The Tianjin bureau also detected excessive copper in imported Japanese coffee.

All the products were destroyed without entering the domestic market, GAQSIQ said.

The Guangdong Entry-Exit Inspection and Quarantine Bureau last week found Japan-produced soy sauce and mustard sauce were tainted by toluene and acetic ester.

(Xinhua News Agency November 5, 2008)