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2. Rapid on-site determination of cadmium in crayfish by dilute acid extraction and anodic stripping voltammetry

Author

Cai Yeqiang, Fu Chuan, Kang Ma, Bi-Liang Yin, Yi-Kun Wang, and Min Chen

Subjects
Detection limit, Cadmium, Chromatography, Extraction (chemistry), chemistry.chemical_element, Hydrochloric acid, Electric apparatus and materials. Electric circuits. Electric networks, Anodic stripping voltammetry, Crayfish, Industrial and Manufacturing Engineering, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Mechanics of Materials, Sodium diacetate, Basic solution, On-site determination, Reference material, Electrical and Electronic Engineering, Inductively coupled plasma, TK452-454.4
Abstract

A method for rapid on-site determination of cadmium in crayfish by dilute acid extraction and anodic stripping voltammetry (ASV) was established. It was determined to use 3% hydrochloric acid as the extraction solution, 20 min as extraction time, 10% sodium diacetate as the basic solution in performing the anodic stripping voltammetry analysis. In the interval of (0.005–1.0) mg kg−1, the content of cadmium in crayfish had a good linear relationship with the peak current. The method was applied to the crayfish reference material. The limit of detection was 0.005 mg kg−1. The repeatability was 3.8%. The results had no significant difference between ASV and ICP-MS (Inductively Coupled Plasma - Mass Spectrometry) method with T-test statistical method. This method is simple, rapid and sensitive. It has been carried on-site to detect real crawfish sample in food rapid detection vehicle.

Published
2021
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4. Synthesis of Polymer Assembled Mesoporous CaCO3 Nanoparticles for Molecular Targeting and pH-Responsive Controlled Drug Release.

Author

Xing, Jinjing, Cai, Yeqiang, Wang, Yikun, Zheng, Haifu, and Liu, Yujia

Subjects
*POLYMERIZATION, *DRUG control, *FOLIC acid, *SODIUM alginate, *CELL imaging, *BODY fluids, *CHITOSAN
Abstract

CaCO3 nanoparticles are very suitable as intelligent carriers because of their ideal biocompatibility and biodegradability, especially their sensitivity to pH. In this paper, we use mesoporous CaCO3 nanoparticles as intelligent carrier, sodium alginate, and chitosan as alternating assembly materials, folic acid as target molecules, and exploit layer-by-layer assembly technology to achieve sensitive molecular targeting and pH response drug release. Mesoporous CaCO3 hybrid nanoparticles have high drug loading on doxorubicin. The effects of different pH values on drug release in vitro were studied by regulating simulated body fluids with different pH values. The cytotoxicity, targeting effect, and drug release of human cervical cancer cell line (HeLa) were studied by cell vitality and imaging experiments. All the evidence suggests that the smart mesoporous CaCO3 nanoparticles may be a potential clinical application platform for cancer therapy. [ABSTRACT FROM AUTHOR]

Published
2020
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