Mother solution of standard solution for chromatography of heavy metals in leather and preparation method of standard curve

Abstract

The invention relates to a technology for fast determination of heavy metals in leather and particularly relates to a standard curve for fast determination of heavy metals in leather by X-ray fluorescence energy spectrum analysis and a mother solution of the standard solution, which is used for preparing the standard curve. The mother solution of the standard solution is prepared from a leather penetrating agent, phosphoric acid, nitric acid and the national standard solution of nine heavy metals. A method for preparing the standard curve comprises the following steps: (1) preparing the mother solution of the standard solution; (2) preparing a multi-gradient standard solution; (3) preparing a series of standard test samples of the heavy metals in the leather; (4) preparing circular sheets of the standard test samples to be tested of the leather; (5) detecting by X-ray fluorescence chromatography; (6) drawing the standard curve. The technology provided by the invention has the advantages that the detection precision of the nine heavy metal harmful substances in the leather can be improved to meet the requirements of a national standard, thus the advanced technology of the X-ray fluorescence chromatography can be applied to detection of the nine heavy metal harmful substances in the leather.

Description

[0001] technical field [0002] The invention relates to a technology for rapid determination of heavy metals in leather, in particular to preparing a standard curve for rapid determination of heavy metals in leather by X-ray fluorescence energy spectrum analysis, and a standard solution mother liquor for preparing the standard curve. Background technique [0003] At present, there are strict requirements on the content of heavy metals in leather at home and abroad. GB / T 22930-2008 clearly stipulates the metal elements that need to be measured in leather: lead, cadmium, nickel, chromium, cobalt, copper, antimony, arsenic, mercury, a total of nine kinds . [0004] At present, the nine methods for detecting heavy metals mainly include: atomic absorption method, atomic fluorescence method, plasma emission spectrometry, chemical detection method, etc. The determination of heavy metal content in leather by atomic absorption method and atomic fluorescence method has high accuracy...

AI Technical Summary

Problems solved by technology

Atomic absorption method and atomic fluorescence method are used to determine the content of heavy metals in leather, which has high accuracy, but the sample preparation is cumbersome, and multiple elements in the sample cannot be measured at the same time, so the operation is time-consuming and laborious.

Plasma emission spectrometry requires cumbersome sample preparation and can simultaneously determine multiple elements in the sample, but the instrument is expensive and the detection cost is high

The portable X-ray fluorescence energy spectrometer method analyzes heavy metals in leather through X-ray fluorescence energy spectroscopy. Due to the simple spectral line, the method of directly pressing the powder after the leather is crushed is used to extract the metal elements without chemical pretreatment, but the error is large Difficult to use for accurate detection

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