Copper (Cu)

Potassium (K)

1,3,4,7-Tetrachlorodibenzofuran , 1.2ml x 50ug/ml, nonane

ISO 17495 Internal Standard Stock Solution 2 Internal standards, each 10µg/mL in acetone; unit: 1x5mL 2061.6 2,4-Dibromophenol [615-58-7] 2060.6 2,4,6-Tribromophenol [118-79-6] The following compounds are suggested as alternative I