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Method for determining content of potassium chloride 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: 2021-10-01
上海耀大生物科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when atomic absorption spectrophotometry is used for detection, since potassium ions are very easy to ionize, ordinary glass measuring bottles contain potassium silicate, and the glass container wall is easy to dissolve potassium 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 content of potassium chloride in compound polyethylene glycol electrolyte powder
  • Method for determining content of potassium chloride in compound polyethylene glycol electrolyte powder
  • Method for determining content of potassium chloride in compound polyethylene glycol electrolyte powder

Examples

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Embodiment 1

[0035] Provide a kind of assay method of potassium chloride content in compound polyethylene glycol electrolyte powder, comprise the steps:

[0036] (1) Preparation of reference substance solution: Take 0.094g of potassium chloride reference substance, accurately weighed, place in a 250ml polypropylene plastic volumetric flask, add anhydrous sodium sulfate 0.715g, sodium bicarbonate 0.21g, sodium chloride 0.185 g and polyethylene glycol 40008.0g, add water to dissolve and dilute to the mark, shake well, then accurately measure 10ml, put it in a 100ml polypropylene plastic volumetric flask, add water to dilute to the mark, shake well, and you get it;

[0037] (2) Preparation of standard solution: Accurately measure 2ml, 3ml, 4ml, 5ml, 6ml of the reference substance solution, place them in 100ml polypropylene plastic volumetric flasks respectively, add 3ml of 2% cesium chloride solution, and dilute with water to Scale and shake well to get potassium series standard solution 0.39...

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Abstract

The invention discloses a method for determining the content of potassium chloride in compound polyethylene glycol electrolyte powder. The method comprises the following steps: (1) preparing a reference substance solution: preparing a reference substance solution of potassium element; (2) preparing a standard solution: precisely measuring the reference solution to prepare a sodium element series standard solution; (3) preparing a test solution: taking the content of the compound polyethylene glycol electrolyte powder, and preparing a concentration matched with the potassium element series standard solution; (4) preparing 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 766.5 nm, drawing a regression equation according to the concentration of the standard solution and the absorbance, and calculating the concentration of potassium chloride in the test solution. The method disclosed by the invention is simple and rapid to operate, high in sensitivity and high 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 potassium chloride 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 potassium chloride content in its imported drug registration standard JX20170220 uses atomic absorption spectrophotometry (standard curve method) to measure absorbance at a wavelength of 404.4nm. First prepare at least 5 copies of potassium chloride reference substance solutions with different concentrations, and the concentr...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/38
CPCG01N21/3103G01N1/38
Inventor 李小清蒋雅红李玉柱顾珽
Owner 上海耀大生物科技有限公司
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