[Study of the Mn-doped ZnS quantum dots as the phosphorescence probes to detect the micro-quantity Hg2+].

In the present paper, the Mn-doped ZnS quantum dots were synthesized in water, and the MPA was used as the stabilizer. Utilizing the strong quenching effect of Hg2+ to the phosphorescence of the ZnS: Mn quantum dots, the method to detect micro-quantity Hg2+ in water was established by using the quantum dots as the phosphorescence probes. Compared to the fluorescence methods, the phosphorescence has longer lifetime and higher selectivity, and avoids the interference of the fluorescence and the scattering light.

[Study of CdTe quantum dots as fluorescence probe to detect trace amount of Pb2+].

The surface modified quantum dots (QDs) as fluorescence probe to quantitatively detect the Pb2+ in water phase was studied in the paper. Using the mercaptopropionic acid (MPA) as the stabilizer, the CdTe quantum dots were synthesized in water phase. Based on the quenching effect of the Pb2+ on the QDs fluorescence, the method for detecting trace Pb2+ using QDs as probe was established.

Selective determination of cysteine by resonance light scattering technique based on self-assembly of gold nanoparticles.

The interaction between cysteine and gold nanoparticles was studied. Through the covalent combination with the -SH group and the electrostatic binding with the -NH3+ group of cysteine, gold nanoparticles can self-assemble to form a network structure, which results in greatly enhanced resonance light scattering (RLS). The experimental results demonstrate that the RLS technique offers a sensitive tool for investigations of self-assembly of nanoparticles.

[Quantitatively determining trace elements Co and Bi in gelatin by inductively coupled plasma atomic emission spectrometry method--applying IEC model to correct the spectral interference of Fe to Co].

By ICP-AES, the authors established the method to quantitatively determine the trace elements Co and Bi in gelatin. The authors processed the unknown sample with wet digesting method. Trace elements in gelatin could be quantitatively determined at the same time.

[Determination of micro-elements in couplers by inductively coupled plasma atomic emission spectrometry].

By ICP-AES, we established a method to quantitatively determine the micro-elements in couplers. We processed the unknown sample with wet digesting method. Nine micro-elements in the couplers can be quantitatively determined at the same time.