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Trace hydrotalcite titration measurement method

A technology of aluminum magnesium carbonate and measurement method, which is applied in the direction of chemical analysis by titration method, measurement device, chemical method analysis, etc., and can solve problems such as complicated operation

Pending Publication Date: 2021-02-02
四川健能制药有限公司
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Problems solved by technology

[0003] At present, atomic absorption spectrophotometry is also used to measure the content of trace aluminum elements, but atomic absorption spectrophotometer is required, and the operation is more complicated

Method used

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  • Trace hydrotalcite titration measurement method
  • Trace hydrotalcite titration measurement method
  • Trace hydrotalcite titration measurement method

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Experimental program
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Embodiment Construction

[0010] method validation

[0011] The detection limit, accuracy, intermediate precision, linearity and range were mainly investigated.

[0012] 1. Detection limit

[0013] 1.1 Solution preparation

[0014] 1) Standard stock solution: take about 100 mg of aluminum magnesium carbonate raw material, accurately weigh it, put it in a 50 ml measuring bottle, add 1 ml of 7mol / L hydrochloric acid solution to dissolve, add purified water to the mark and shake well, and use it as a standard stock solution.

[0015] 2) Dilute solution 1: Take 100 μl of the standard stock solution, put it in a 500ml Erlenmeyer flask, add 30ml of water, shake well, and get ready.

[0016] 3) Dilute solution 2: Take 50 μl of the standard stock solution, put it in a 500ml Erlenmeyer flask, add 30ml of water, shake well, and obtain.

[0017] 4) Dilute solution 3: Take 25 μl of the standard stock solution, put it in a 500ml Erlenmeyer flask, add 30ml of water, shake well, and obtain.

[0018] 5) Blank solv...

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Abstract

The invention provides a trace hydrotalcite titration measurement method. Detection parameters are as follows: 1) the addition amount of a chrome black T indicator is determined, and the addition of alittle of the chrome black T indicator is changed into the addition of 0.1 g of the chrome black T indicator; and 2) an ethylenediamine tetraacetic acid disodium titrating solution (0.05 mol / L) is changed into an ethylenediamine tetraacetic acid disodium titrating solution (0.005 mol / L). The method refers to a method for measuring the content of magnesium oxide in a hydrotalcite raw material, thecontent of trace hydrotalcite is obtained by measuring magnesium oxide and converting magnesium oxide, and rapid and accurate analysis of the content of trace hydrotalcite can be realized.

Description

technical field [0001] The invention relates to a method for detecting the content of a trace amount of aluminum magnesium carbonate. The method refers to the detection method of magnesium oxide, and obtains the content of aluminum magnesium carbonate through conversion. Background technique [0002] Use more at present and be used for measuring aluminum magnesium carbonate Determination method is the complexometric titration method: get test sample appropriate amount, accurately weighed (approximately equivalent to aluminum magnesium carbonate 0.3g), add 7mol / L hydrochloric acid solution 2ml, water-bath heating 15 minutes, Let cool, add 150ml of water, precisely add 50ml of disodium ethylenediaminetetraacetic acid titration solution (0.05mol / L), add 2 drops of methyl red indicator solution, neutralize with 1mol / L sodium hydroxide solution until the solution becomes yellow, and put in a water bath Heat for 30 minutes, let cool, add 3 g of urotropine and 1 ml of xylenol orang...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/162
Inventor 徐兴利万华英王雪
Owner 四川健能制药有限公司
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