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Method for determining total sodium content in compound polyethylene glycol electrolyte powder

A polyethylene glycol and determination method technology, applied in the field of chemical analysis, can solve problems such as poor repeatability and inaccurate measurement results, and achieve the effects of good repeatability, good solution stability, and stable solution

Pending Publication Date: 2021-06-25
上海耀大生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when atomic absorption spectrophotometry is used for detection, because sodium ions are very easy to ionize, ordinary glass measuring bottles contain sodium silicate, and the walls of glass containers are easy to dissolve sodium ions, which will cause changes in the absorbance of the solution, resulting in inaccurate measurement results. bad sex

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  • Method for determining total sodium content in compound polyethylene glycol electrolyte powder
  • Method for determining total sodium content in compound polyethylene glycol electrolyte powder
  • Method for determining total sodium content in compound polyethylene glycol electrolyte powder

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Embodiment 1

[0039] A method for assaying total sodium content in compound polyethylene glycol electrolyte powder is provided, comprising the steps of:

[0040] (1) Preparation of reference substance solution: take 0.1823g of sodium chloride reference substance, accurately weighed, put in a 50ml polypropylene plastic volumetric flask, add potassium chloride 0.0185g and polyethylene glycol 40001.60g, add water to dissolve and dilute to scale, shake well, then accurately measure 1ml, put it in a 100ml polypropylene plastic volumetric bottle, add water to dilute to the mark, shake well, and you get it;

[0041] (2) Preparation of standard solution: Accurately measure 2ml, 3ml, 4ml, 5ml, 6ml of reference substance solution, put them in 100ml polypropylene plastic volumetric flask respectively, add 5.0ml of 2% cesium chloride solution, add water to dilute to Scale and shake well to get sodium series standard solution 0.2867mg / L, 0.4303mg / L, 0.5737mg / L, 0.7172mg / L, 0.8606mg / L;

[0042](3) Prepa...

Embodiment 2

[0047] A method for assaying total sodium content in compound polyethylene glycol electrolyte powder is provided, comprising the steps of:

[0048] (1) Preparation of reference substance solution: take 0.1823g of sodium chloride reference substance, accurately weighed, put in a 50ml polypropylene plastic volumetric flask, add potassium chloride 0.0185g and polyethylene glycol 40001.60g, add water to dissolve and dilute to scale, shake well, then accurately measure 1ml, put it in a 100ml polypropylene plastic volumetric bottle, add water to dilute to the mark, shake well, and you get it;

[0049] (2) Preparation of standard solution: Accurately measure 2ml, 3ml, 4ml, 5ml, 6ml of reference substance solution, put them in 100ml polypropylene plastic volumetric flask respectively, add 5.0ml of 2% cesium chloride solution, add water to dilute to Scale and shake well to get sodium series standard solution 0.2867mg / L, 0.4303mg / L, 0.5737mg / L, 0.7172mg / L, 0.8606mg / L;

[0050] (3) Prep...

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Abstract

The invention discloses a method for measuring the total sodium content in compound polyethylene glycol electrolyte powder. The method comprises the following steps: (1) preparing a reference substance solution, namely preparing the reference substance solution with the sodium element concentration of 14.33494 mg / L; (2) preparing a standard solution: precisely measuring the reference solution to prepare a sodium element series standard solution; (3) preparation of a test solution: taking the content of the compound polyethylene glycol electrolyte powder, and preparing the content with the concentration matched with the sodium element series standard solution; (4) preparation of a blank solution: precisely weighing a proper amount of polyethylene glycol, and preparing a solution with a concentration matched with that of the test solution; and (5) respectively taking the blank solution, the standard solution and the test solution, measuring absorbance at the wavelength of 589.0 nm, drawing a regression equation according to the concentration of the standard solution and the absorbance, and calculating the concentration of sodium in the test solution. The method disclosed by the invention is simple and rapid to operate, high in sensitivity and good in repeatability, the solution stability in the method is good, and the measured data is more accurate.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a method for determining the total sodium content in compound polyethylene glycol electrolyte powder. Background technique [0002] The compound polyethylene glycol electrolyte powder is mainly used for the removal of intestinal contents and the treatment of constipation during colonoscopy and pretreatment of colon surgery, and has a high market value. This product is a compound preparation, and its components are polyethylene glycol 4000, anhydrous sodium sulfate, sodium chloride, potassium chloride, and sodium bicarbonate. The determination of total sodium content in its imported drug registration standard JX20170220 adopts atomic absorption spectrophotometry (standard curve method) to measure absorbance at a wavelength of 819.5nm. First prepare at least 5 parts of sodium chloride reference substance solutions with different concentrations, and the concentrations are...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/3103
Inventor 张健李小清蒋雅红李玉柱顾珽王兰杰白国燕韩国玉范颖颖郁波周双凤
Owner 上海耀大生物科技有限公司
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