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Pretreatment method of Acesulfame-K and detection method for potassium in Acesulfame-K

A detection method and element technology, which is applied in the detection of potassium in AK sugar and the field of pretreatment of AK sugar, can solve the problems of sample pollution, affecting the accuracy of test results, and incomplete ashing of samples, so as to improve accuracy, The effect of low release and low sample contamination rate

Active Publication Date: 2013-01-09
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The detection method of potassium content in AK sugar is based on the determination method of potassium content mentioned in the light industry standard QB 2393-1998 "Food Additive Acesulfame Potassium (AK Sugar)". During the preparation of the sample solution, the solution Repeated transfer and filtration are likely to cause sample contamination and affect the accuracy of test results
[0004] The sample pretreatment methods commonly used in the detection of potassium in food also include dry ashing and wet ashing. Although these two methods avoid the filtration process that causes sample contamination, they only use dry ashing or wet ashing. When processing AK sugar samples, there is always the phenomenon of incomplete ashing of the samples, and repeated ashing will cause contamination of the samples
After the AK sugar sample is pretreated by these traditional methods, the content of potassium element is usually detected by atomic absorption spectrophotometer. Due to the pollution of different degrees in the sample, the detection precision is only 7.86%-12.10%

Method used

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  • Pretreatment method of Acesulfame-K and detection method for potassium in Acesulfame-K

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: A pretreatment method for AK sugar.

[0022] 1. Reagents and solutions.

[0023] Hydrochloric acid solution with a volume fraction of 2%: Accurately absorb 20mL of concentrated hydrochloric acid (excellent grade), add it into a beaker filled with 100mL ultrapure water, mix well, transfer it to a 1000mL volumetric flask after cooling, and determine the volume to 1000mL and mix well.

[0024] Hydrochloric acid solution with a volume fraction of 20%: Accurately absorb 40mL of concentrated hydrochloric acid (excellent grade), add it to a beaker filled with 100mL ultrapure water, mix well, transfer it to a 200mL volumetric flask after cooling, and determine the volume to 200mL and mix well.

[0025] 2. Pretreatment of AK sugar samples to be tested.

[0026] 1) Weigh a certain amount of AK sugar sample to be tested, such as 0.1600g, add 25-50mL concentrated nitric acid (excellent grade) to each gram of the sample to be tested, mix well and heat at 60-80°C until ...

Embodiment 2

[0029] Example 2: Another pretreatment method of AK sugar.

[0030] The reagents and solutions used in this example are the same as those in Example 1 and will not be repeated here.

[0031] In the AK sugar pretreatment method of this embodiment, the test solution obtained by the method described in Example 1 was further diluted 10 times with a 2% hydrochloric acid solution by volume fraction to prepare a test solution dilution.

Embodiment 3

[0032] Embodiment 3: A method for detecting potassium in AK sugar.

[0033] 1. Reagents and solutions.

[0034] Potassium element standard solution: the amount of solution shown in the table below is to absorb the potassium element single-standard stock solution with a potassium element mass concentration of 1000 μg / mL in a 50mL volumetric flask, and dilute to 50mL with a 2% hydrochloric acid solution by volume fraction, mix Mix well and prepare potassium element standard solutions with different mass concentrations as shown in the table below.

[0035]

[0036] Mass concentration of standard solution (μg / mL) Potassium single standard stock solution dosage (mL) 5 0.25 10 0.5 50 2.5 100 5 150 7.5

[0037] 2. Equipment and instruments.

[0038] Inductively coupled plasma optical emission spectrometer (ICP-OES), using PE company OPTIMA5300 inductively coupled plasma optical emission spectrometer. The equipment parameters of ICP-OES are...

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Abstract

The invention relates to a pretreatment method of Acesulfame-K, comprising the following steps: firstly conducting nitric acid digestion treatment, then conducting high-temperature ashing treatment, and finally dissolving. The pretreatment method disclosed herein is an improvement based on orginal dry ashing and wet ashing, simplified the operation process, and effectively reduces the possibility of sample contamination. The invention further provides a detection method for detecting potassium in Acesulfame-K after pretreating the Acesulfame-K with the above pretreatment method, characterized by pretreating an Acesulfame-K sample with the above pretreatment method and then conducting instrument detection of potassium, thus the precision of the detection can be raised, and the content of potassium in the original sample can be accurately reflected.

Description

technical field [0001] The invention relates to a pretreatment method and a detection method of potassium element, in particular to a pretreatment method of AK sugar and a detection method of potassium element in AK sugar using the same. Background technique [0002] Potassium is a mineral nutrient element necessary to maintain the normal growth and health of the body, and exists in human cells and tissues in the form of ions. The scientific name of AK sugar is acesulfame potassium (Acesulfame-K), which has been allowed to be used as a low-calorie sweetener since 1988. It is an organic synthetic salt with a taste similar to sucrose, 200 times sweeter than sucrose, and has a synergistic sweetening effect when used with other sweeteners. Because of its high sweetness, stable properties, refreshing taste and low price, it has become a widely used food additive so far. [0003] The detection method of potassium content in AK sugar is based on the determination method of potass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N21/73G01N21/31
Inventor 其其格乌尼尔高娃常建军李梅刘卫星
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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