Alternative chiral thiols for preparation of chiral CdS quantum dots covered immediately by achiral thiols.

Developing of alternative chiral thiol stabilizers from the assembly of achiral thiol (e.g. thioglycolic acid) and chiral ligand (e.

Development of an enzyme-linked immunosorbent assay specific to Sudan red I.

To obtain antibodies to develop an enzyme-linked immunosorbent assay (ELISA) for the analysis of Sudan red I, haptens were designed and synthesized via four different strategies: (i) attachment of a spacer at the para position of the benzene ring, (ii) attachment of a spacer at the naphthol part, (iii) attachment of a spacer at the hydroxyl group of the Sudan red I molecule, and (iv) use of a fragment of the target molecule. A total of 10 haptens were used to generate immunogens, coating antigens, and polyclonal antibodies. One of the heterologous ELISAs developed exhibited an IC(50) of 1.

Quantitative analysis of the neonicotinoid insecticides imidacloprid and thiamethoxam in fruit juices by enzyme-linked immunosorbent assays.

Rapid and sensitive ELISAs have been applied to analyze imidacloprid and thiamethoxam residues in apple, grape, orange, and peach juices after simple dilution of the samples without any extraction and cleanup. The matrix interference of the fruit juices was eliminated after 100-fold dilution, and the ELISAs gave method LODs of imidacloprid and thiamethoxam in fruit juices down to 20 and 5 ng/g, respectively. Average recoveries of imidacloprid and thiamethoxam from the spiked fruit juices were in the range of 92-115% and 87-118%, respectively.