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A method of measuring a plurality of heavy metals in an organic pigment by a microwave digestion-inductively coupled plasma mass spectrometry

A technology of inductive coupling and organic pigments, which is applied in the preparation of test samples, material analysis by electromagnetic means, and measurement devices, etc., can solve problems such as cumbersome operation, element volatilization loss, and uncertainty loss, and achieve reproducibility Good, simple operation, high sensitivity effect

Inactive Publication Date: 2015-04-22
PROD QUALITY SUPERVISING & INSPECTING INST OF TAIZHOU CITY
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Problems solved by technology

The pretreatment method of heavy metal detection in inorganic pigments can choose wet digestion, while organic pigments are difficult to dissolve in water, the current wet pretreatment method is not feasible, and dry digestion is likely to cause uncertain losses of some elements such as lead , and the traditional burning method, on the one hand, the error caused by human operation is large, and the pretreatment requires a long time. In addition, it is easy to cause the loss of lead and some other elements in the pigment, and the operation is cumbersome and inaccurate.

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  • A method of measuring a plurality of heavy metals in an organic pigment by a microwave digestion-inductively coupled plasma mass spectrometry
  • A method of measuring a plurality of heavy metals in an organic pigment by a microwave digestion-inductively coupled plasma mass spectrometry
  • A method of measuring a plurality of heavy metals in an organic pigment by a microwave digestion-inductively coupled plasma mass spectrometry

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Embodiment Construction

[0018] The invention provides a kind of method for microwave digestion-inductively coupled plasma mass spectrometry to measure multiple heavy metals in organic pigments, which comprises the following steps:

[0019] Step 1, first prepare reagents and materials, nitric acid: 67% GR. (MOKEL), mixed standard stock solution: 50mg / L, when used, use 0.2mol / L nitric acid to dilute step by step, mixed internal standard solution: 100mg / L scandium, Germanium, rhodium, terbium, bismuth mixed solution, the medium is nitric acid solution, tuning solution: 10mg / L lithium, yttrium, titanium mixed solution, the medium is nitric acid solution, tertiary water: produced by MILLOPORE ultrapure water generator with resistivity less than 18.2 Ω;

[0020] Step 2, prepare instruments and equipment, prepare an inductively coupled plasma mass spectrometer, a microwave digestion instrument and an electronic balance, the inductively coupled plasma mass spectrometer is an Agilent7700X type inductively cou...

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Abstract

A method of measuring a plurality of heavy metals in an organic pigment by a microwave digestion-inductively coupled plasma mass spectrometry is disclosed. The method comprises: a first step of preparing agents and materials, a second step of preparing instruments and devices, a third step of preparing standard working solutions, a fourth step of subjecting an organic pigment sample to microwave digestion pretreatment, a fifth step of setting main working parameters of ICP-MS instruments and a sixth step of selecting pretreatment of the sample.

Description

technical field [0001] The invention relates to a microwave digestion-inductively coupled plasma mass spectrometry method for determining various heavy metals in organic pigments. Background technique [0002] Pigment is a kind of colored substance with dual functions of decoration and protection. It is usually used in the form of dispersion of fine particles in paints, inks, plastics, rubber, textiles, paper, building materials, enamel, food utensils and other products. With the rapid development of the application of the pigment industry, the quality and safety of pigments are constantly emerging, especially the problem of heavy metal pollution in pigments. The pretreatment method of heavy metal detection in inorganic pigments can choose wet digestion, while organic pigments are difficult to dissolve in water, the current wet pretreatment method is not feasible, and dry digestion is likely to cause uncertain losses of some elements such as lead , while the traditional bur...

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Application Information

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IPC IPC(8): G01N27/62G01N1/44G01N27/626
Inventor 陈芳云姚锦锟黄绍勇谢甫祥
Owner PROD QUALITY SUPERVISING & INSPECTING INST OF TAIZHOU CITY
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