State;
Key;
Laboratory;
of;
Electroanalytical;
Chemistry,;
Changehun;
Institute;
of;
Applied;
Chemistry,;
Chinese;
Academy;
of;
Sciences,;
Changchun;
130022,;
R;
R.;
China;
Graduate;
School;
of;
the;
Chinese;
Academy;
ofScienees,;
Beoing;
100049,;
P.;
R.;
China;
金纳米粒子; 铅(Ⅱ); 比色测定; 金属离子螯合剂; 水介质; 国民生产总值; 基础; 离子检测;