Rapid detection method for metal ions in wine

Abstract

The invention relates to a rapid detection method for metal ions in wine. The method comprises the following steps: (1) a Schiff base metal ion probe is prepared by a Schiff base reaction; (2) gold nanorods (Au) are synthesized through seed growth; (3) the metal irons and the Schiff base are subjected to complexing reaction, and a Schiff base metal complex is formed; and (4) the generated complexis detected by using a portable Raman spectrometer, an ultraviolet spectrophotometer and a fluorescence spectrophotometer, and thus, qualitative and quantitative analysis and detection on Cu<2+> and Zn<2+> contained in a wine product are thus carried out. In comparison with the prior art, the Schiff base metal complex is detected by using SERS, ultraviolet and fluorescence sensors, the detection is more accurate, labeling and separation and purification do not needed, monitoring and detection on Cu<2+> and Zn<2+> in a wine product during the production and storage process of the wine can be realized, and the detection limit is 1*10<-10> M.

Description

technical field [0001] The invention relates to a detection method, in particular to a rapid detection method for metal ions in wine. Background technique [0002] Wine is a beverage more and more recognized by the public, which has high nutritional value and health care. Wine contains sugar, pectin, phlegm, various organic acids, inorganic substances, trace elements, dozens of amino acids and multivitamins. Among trace metal elements, copper is one of the more active trace elements. The source of copper generally includes the use of copper-containing vineyard sprays that are brought into the wine, or the grapes are stained with soil or dust to bring copper ions into the wine, and during the production process, the winemaking tools that come into contact may contain copper. In addition to copper, there is also zinc. For zinc, plants absorb trace amounts of zinc from the ground, use of zinc-containing pesticides, wine treatment during winemaking, and use of zinc-containing...

AI Technical Summary

Problems solved by technology

Atomic absorption spectrometry has the characteristics of complex operation and low analytical sensitivity, and is not suitable for the simultaneous analysis and detection of multiple elements; UV-visible absorption spectrometry has the characteristics of poor specificity and weak anti-interference, and is not suitable for the analysis of trace elements in complex samples ; The equipment cost and operating cost of inductively coupled mass spectrometry are high, which is not suitable for on-site rapid detection of samples

However, surface-enhanced Raman scattering, ultraviolet absorption and fluorescence spectroscopy were used to simultaneously analyze and detect Cu 2+ , Zn 2+ methods are rarely reported

Images