Method for quickly detecting tri-ethanolamine ester

A detection method and ethanolamine ester technology, applied in the field of analysis and detection, can solve the problems of cumbersome process, expensive nuclear magnetic resonance instrument and the like, and achieve the effects of convenient and simple operation, low measurement cost and short measurement time.

Inactive Publication Date: 2015-05-20
GUANGZHOU TINCI MATERIALS TECH
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Problems solved by technology

The determination of triethanolamine ester by reversed-phase high-performance liquid chromatography and gas chromatography requires sample pretreatment before detection, and the process is cumbersome; the nuclear magnetic resonance instrument is expensive and not suitable for industrialized intermediate monitoring, so it is necessary to establish a fast and simple triethanolamine Esters detection method

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  • Method for quickly detecting tri-ethanolamine ester
  • Method for quickly detecting tri-ethanolamine ester
  • Method for quickly detecting tri-ethanolamine ester

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Embodiment 1

[0038] The rapid detection method of a kind of triethanolamine ester of the present embodiment adopts high-performance liquid chromatography detection, comprises the steps:

[0039] (1) Preparation of the test solution

[0040] Accurately weigh 0.2 g (accurate to 0.0001 g) of the triethanolamine ester sample into a 25 mL volumetric flask, use mobile phase to constant volume, and obtain the test solution after filtering through a 0.45 μm organic microporous membrane;

[0041] (2) Determination

[0042] Draw 50 μ L of the test solution and inject it into a high-performance liquid chromatograph for determination, and quantify by the area normalization method;

[0043] The chromatographic conditions are: mobile phase: n-hexane: isopropanol = 50:50 (volume ratio);

[0044] Column: XB-NH 2 5μm 4.6*250mm;

[0045] Detection wavelength: 210nm;

[0046] The detector is an ultraviolet detector;

[0047] The flow rate is 0.4mL / min;

[0048] Column temperature: room temperature. ...

Embodiment 2

[0050] Example 2 Condition screening and methodological verification

[0051] 1. Experimental drugs and instruments

[0052] 1.1 n-Hexane Chromatographically pure

[0053] 1.2 Isopropanol Chromatographically pure

[0054] 1.3 Triethanolamine ester samples commercially available and self-made

[0055] 1.4 Ultrasonic cleaner

[0056] 1.5 Electronic balances, pipettes, measuring cylinders, and volumetric bottles with a precision of 0.0001 grams

[0057] 1.60.45μm organic solvent filter

[0058] 1.7 Shimadzu LC-10AT high performance liquid chromatograph, SPD-20A detector (quantitative loop 20μL)

[0059] 1.8XB-NH 2 5μm 4.6*250mm chromatographic column

[0060] 2. Chromatographic conditions and preparation

[0061] 2.1 Mobile phase preparation:

[0062] Make n-hexane and isopropanol into the mobile phase at a ratio of 50:50 (volume ratio), filter with a 0.45 μm organic filter membrane, and then sonicate for 15 to 20 minutes.

[0063] 2.2 Sample processing:

[0064]Accur...

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Abstract

The invention discloses a method for quickly detecting a tri-ethanolamine ester. During detection, a high performance liquid chromatograph is applied to the method. The method comprises the following steps: (1) preparation of test sample sliquid: precisely weighing a tri-ethanolamine ester sample, determining the volume by a mobile phase, and preparing the test sample solution after filtering a micro-aperture filter membrane; (2) measurement: absorbing the test sample solution which is 2-3 times of a quantitative loop, injecting the solution into the high performance liquid chromatograph for measuring, and quantifying by an area normalization method to realize measurement. The detection method is characterized in that the tri-ethanolamine ester is separated and analyzed qualitatively and quantitatively by using a high performance liquid chromatography method according to different polarities of single ester, di-ester and tri-ester in the tri-ethanolamine ester. The method has the advantages that a high performance liquid-ultraviolet detector which is commonly used in general laboratories and relatively low in price is utilized so that the measuring cost is low; the method is convenient to operate and the measuring time is short; all components can reach a good separating effect, and thus the method is applied to online monitoring of industrialization.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a rapid detection method of triethanolamine ester. Background technique [0002] Ester quaternary ammonium salt is a new type of cationic surfactant with excellent softness, antistatic properties and anti-yellowing. Does not contain APEO, formaldehyde, easy biodegradation, green and environmental protection. The dosage is small, the effect is good, the preparation is convenient, the overall cost is low, and it has a very high cost performance. Esterquat is a cationic surfactant for fabric softening. The product is suitable for use in fabric softener products at concentrations between 5% and 20%. It is the best substitute of dioctadecyl dimethyl ammonium chloride (D1821), soft film, soft olein, etc. [0003] The synthesis of ester-based quaternary ammonium cationic surfactants is divided into two steps. First, fatty acid and triethanolamine undergo esterificatio...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 孙伏恩吴海龙雷秋芬罗海英
Owner GUANGZHOU TINCI MATERIALS TECH
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