Use of packed-fiber solid-phase extraction for sample clean-up and preconcentration of vitamin B <sub>12</sub> before determination

Fang Fang, Xue Jun Kang, Zhi Yong Liu, Yu Qin Ma, Zhong Ze Gu

Use of packed-fiber solid-phase extraction for sample clean-up and preconcentration of vitamin B ₁₂ before determination

Fang Fang, Xue Jun Kang, Zhi Yong Liu, Yu Qin Ma, Zhong Ze Gu

中国化学快报 . 2009, (12): 1491 -1494 . DOI: 10.1016/j.cclet.2009.06.030