4. 測定毛髮中的甲基汞( methyl mercury )含量時,下列何種方法最適用?
A. 放射免疫分析法(radio-immunoassay )
B. 原子吸收光譜測定法(atomic absorption spectrophotometry )
C. 液相層析-電化學偵測法(liquid chromatography -electrochemical detection )
D. 氣相層析-電子捕捉偵測法(gas chromatography -electron capture detection )