CN111141848A - Content determination method of permanent violet - Google Patents
Content determination method of permanent violet Download PDFInfo
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- CN111141848A CN111141848A CN202010004216.0A CN202010004216A CN111141848A CN 111141848 A CN111141848 A CN 111141848A CN 202010004216 A CN202010004216 A CN 202010004216A CN 111141848 A CN111141848 A CN 111141848A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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Abstract
The invention relates to a method for detecting chemicals, in particular to a method for measuring the content of permanent violet. The invention adopts a liquid chromatograph method for determination, adopts a diode array detector, and has the following detection conditions: the detection wavelength is 593 nm, the chromatographic column is a reversed phase C18 column, the mobile phase is tetrahydrofuran, the flow rate is 0.8-1.2 ml/min, and the sample injection volume
Microliter, column temperature of
The method has the advantages of good reproducibility, scientificity, advancement and applicability of the determination method, more accuracy in the aspect of the content precision of the permanent violet, and better application to downstream users for checking the purity of the permanent violet.
Description
Technical Field
The invention discloses a method for detecting chemicals, and particularly relates to a method for measuring the content of permanent violet.
Background
Permanent Violet RL, the English name of which is Pigment Violet 23, the CAS number of which is 6358-30-1, the molecular formula of which is C34H22Cl2N4O2, the molecular weight of which is 589.47, is blue Violet powder with bright color, is insoluble in water, is stable in dimethyl sulfoxide, the decomposition temperature of which is more than 322 ℃, and the relative density (d20) of which is 1.5. It is non-flammable and non-corrosive. The permanent violet has high tinting strength, excellent heat resistance, sun resistance and sublimation resistance. Can be used for coloring paint, ink, rubber and plastic and for coloring synthetic fiber stock solution. How to accurately determine the content of the permanent violet is particularly important, and at the present stage, no literature exists in the method for determining the content of the permanent violet.
The problems of the prior art are that the determination is not carried out: the permanent violet RL is a high-grade organic pigment of dioxazine class. The color paste has the characteristics of outstanding coloring strength and brightness, excellent heat resistance and penetration resistance, good light fastness and excellent performance, has wide application range, is a popular variety in the fields of various coatings, plastics, organic glass, rubber, textile printing, solvent amount, water-based ink, packaging printing and the like, and is also suitable for offset printing, gravure printing and flexographic printing. Since these fields are in wide contact with consumers, if the purity of the permanent violet is not sufficient, some harmful impurities, especially polychlorinated biphenyl and arylamine, may exist to have adverse effects on consumers, and therefore, the measurement of the purity of the permanent violet is helpful for downstream users to better control the product quality.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a convenient detection method.
The invention is realized by the following technical scheme:
a method for measuring the content of permanent violet is characterized in that a liquid chromatograph method is adopted for measurement, a diode array detector is adopted, and the detection conditions are as follows: the detection wavelength is 593 nanometers, the chromatographic column is a reversed phase C18 column, the mobile phase is tetrahydrofuran, the flow rate is 0.8-1.2 ml/min, the sample injection volume is 10-20 microliters, and the column temperature is 25-35 ℃.
Preferably, in the method for measuring the content of permanent violet, the chromatographic column has an inner diameter of 4.6 mm, a column length of 150 mm and a filler particle size of 5 microns.
Preferably, the flow rate in one of the aforementioned methods for measuring the content of permanent violet is 1.0 ml per minute.
The invention has the advantages that:
the method has the advantages that the content of the permanent violet is determined by adopting the liquid chromatography through groping and repeated test screening of specific determination conditions, the permanent violet is better separated from other organic impurities by selecting specific chromatographic columns and mobile phases, the reproducibility of the method is good, the scientificity, the advancement and the applicability of the determination method are provided, the determined content precision of the permanent violet is more accurate, and the method can be better used for a downstream user to check the purity of the permanent violet.
Drawings
FIG. 1 is a graph showing the results of example 1 of the present invention
Detailed Description
The following is a detailed description of the practice of the invention:
example 1
A method for measuring the content of permanent violet adopts liquid chromatography, and the detection conditions are as follows: the detection wavelength is 593 nm, the chromatographic column is a C18 column, the mobile phase is tetrahydrofuran, the flow rate is 0.8-1.2 ml per minute, the sample injection volume is 20 microliter, and the column temperature is 35 ℃. The results are shown in FIG. 1.
Example 2
A method for measuring the content of permanent violet adopts liquid chromatography, and the detection conditions are as follows: the detection wavelength is 593 nanometers, the chromatographic column is a C18 column, the mobile phase is tetrahydrofuran, the flow rate is 1.0 milliliter per minute, the sample injection volume is 15 microliters, the column temperature is respectively 25 ℃, wherein the inner diameter of the chromatographic column is 4.6 millimeters, the column length is 150 millimeters, and the filler particle size is 5 micrometers. The results were similar to those of example 1.
Claims (3)
1. A method for measuring the content of permanent violet is characterized in that a liquid chromatograph method is adopted for measurement, a diode array detector is adopted, and the detection conditions are as follows: the detection wavelength is 593 nm, the chromatographic column is a reversed phase C18 column, the mobile phase is tetrahydrofuran, the flow rate is 0.8-1.2 ml/min, and the sample injection volume
Microliter, column temperature of
2. The method for measuring content of permanent violet according to claim 1, wherein the chromatographic column has an inner diameter of 4.6 mm, a column length of 150 mm and a filler particle size of 5 microns.
3. The method of claim 1, wherein the flow rate is 1.0 ml per minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004216.0A CN111141848A (en) | 2020-01-03 | 2020-01-03 | Content determination method of permanent violet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004216.0A CN111141848A (en) | 2020-01-03 | 2020-01-03 | Content determination method of permanent violet |
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| CN111141848A true CN111141848A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010004216.0A Pending CN111141848A (en) | 2020-01-03 | 2020-01-03 | Content determination method of permanent violet |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104245795A (en) * | 2012-03-30 | 2014-12-24 | 沙特基础创新塑料Ip私人有限责任公司 | Polyetherimides, methods of manufacture, and articles formed therefrom |
| CN109541059A (en) * | 2018-11-19 | 2019-03-29 | 山西北化关铝化工有限公司 | A method of measurement TCTNB purity |
-
2020
- 2020-01-03 CN CN202010004216.0A patent/CN111141848A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104245795A (en) * | 2012-03-30 | 2014-12-24 | 沙特基础创新塑料Ip私人有限责任公司 | Polyetherimides, methods of manufacture, and articles formed therefrom |
| CN109541059A (en) * | 2018-11-19 | 2019-03-29 | 山西北化关铝化工有限公司 | A method of measurement TCTNB purity |
Non-Patent Citations (2)
| Title |
|---|
| 刘俊等: "《可食性包装材料质量检验》", 30 April 2017, 中国质检出版社 * |
| 张庆华等: ""永固紫"染料和四氯苯醌中多氯代二苯并二噁英/呋喃的分析", 《色谱》 * |
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Application publication date: 20200512 |