TMPyP [=alpha,beta,gamma,delta-Tetrakis(1-methylpyridinium-4-yl)porphyrin p-Toluenesulfonate][Ultra-high sensitive spectrophotometric reagent for Cu, Mg] [For the simultaneous determination of metals by HPLC] TMPyP[=α,β,γ,δ-四(1-甲基吡啶嗡-4-基)卟吩对甲苯磺酸盐][铜和镁用超高灵