1 Introduction
2 Materials and methods
2.1 Chemicals
2.2 Instrumentation
2.3 Preparation of Pd: CdTe quantum dots
2.4 Fluorescence study
2.5 Determination of DZN
2.6 Cell viability assays
3 Results and discussion
3.1 The optical properties of Pd: CdTe QDs
3.2 Characterization of Pd: CdTe QD
3.3 Optimization of analytical conditions
3.3.1 Effect of reaction time
3.3.2 Effect of acidity
3.3.3 Effect of ionic strength
3.4 Determination of DZN with Pd: CdTe QDs
3.5 Mechanism of the “turn-off” fluorescent probe
3.6 Interference and selectivity studies
3.7 Assay of DZN concentrations in environmental water samples
Sample | Spiked (µM) | Value found (n = 3) | R.S.D (%) | Recovery (%) |
---|---|---|---|---|
Rainwater | 5 | 5.1 ± 0.78 | 1.4 | 102.4 |
River water | 5 | 4.88 ± 1.19 | 2.0 | 97.6 |
Tap water | 5 | 4.79 ± 1.43 | 1.8 | 95.8 |