CN110044892A - The calculation method of sodium chloride content in a kind of edible salt - Google Patents
The calculation method of sodium chloride content in a kind of edible salt Download PDFInfo
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- CN110044892A CN110044892A CN201910430694.5A CN201910430694A CN110044892A CN 110044892 A CN110044892 A CN 110044892A CN 201910430694 A CN201910430694 A CN 201910430694A CN 110044892 A CN110044892 A CN 110044892A
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Abstract
The calculation method of sodium chloride content, is related to the technical field of sodium chloride content detection method in edible salt in a kind of edible salt.The present invention includes the following steps: 1) determination of moisture: according to direct drying method, drying temperature is set as 140 DEG C ± 2 DEG C, it is dry to front and back twice of poor quality less than 5 ㎎, as constant weight；2) it determination of chloride ion: after the sample dissolution in step 1), uses potassium chromate as indicator, is titrated with silver nitrate standard titration solution, measure the content of chloride ion.The present invention realizes that calculating process is simple, and data volume is smaller, the accurate purpose of calculated result.
Description
Technical field
The present invention relates to the technical fields of sodium chloride content detection method in edible salt.
Background technique
The random checking work of edible salt is the important means of supervision edible salt quality safety after salt industry reform, edible salt inspection
The project of testing includes the parameters such as sodium chloride, lead, total arsenic, cadmium, total mercury, barium, potassium chloride, ferrous potassium chloride, iodine, the current method of inspection
Main foundation " measurement of national food safety standard salt index " (GB 5009.42-2016), the wherein survey of sodium chloride content
Surely need to successively calculate the content of calcium sulfate, magnesium sulfate, sodium sulphate, calcium chloride, magnesium chloride, potassium chloride according to method, residual chlorine from
Son is calculated as sodium chloride (wet basis) content, and calculating process is very cumbersome, seven pacings need to be divided to calculate sodium chloride content, finally according to moisture
Content calculates sodium chloride (wet basis) content.In examining detection process, only parameter one, sodium chloride (butt meter) is just divided into eight
Step causes subsequent calculating to occupy a large amount of time and energy, inefficiency, and calculating process easily malfunctions.
Summary of the invention
It is an object of the present invention to provide a kind of calculating process is simple, data volume is smaller, chlorine in the accurate edible salt of calculated result
Change the calculation method of sodium content.
The calculation method of sodium chloride content in a kind of edible salt, it is characterised in that include the following steps:
1) determination of moisture:
According to direct drying method, drying temperature is set as 140 DEG C ± 2 DEG C, it is dry to front and back twice of poor quality less than 5 ㎎,
As constant weight；
2) determination of chloride ion:
After the sample dissolution in step 1), uses potassium chromate as indicator, titrated with silver nitrate standard titration solution, measure chlorine
The content of ion.
It is preferable to potassium chromate indicator of the invention are as follows: weigh 10g potassium chromate and be dissolved in 100ml water, stir lower drop
Add silver nitrate solution to there is red-brown precipitation, filters.
Step 2) of the invention specifically includes: weighing the smashed sample of 25g in 400ml beaker, is added 200ml's
Water, heating, is stirred with glass bar to whole dissolutions；It is transferred to 500ml volumetric flask after cooling, adds water constant volume, shakes up；Draw 25ml
Sample solution, with water constant volume, shakes up in 250ml volumetric flask；Then measurement is drawn the diluted sample solution of 25ml and is bored in 150ml
In shape bottle, 50ml is added water to, 4 drop potassium chromate indicator are added, are titrated while stirring with silver nitrate standard titration solution, until outstanding
Occurring stable salmon pink in turbid is terminal；Blank test is done simultaneously.
Chloride ion content is settled accounts according to formula (1) in sample:
Wherein X1It is chloride ion content in sample, is indicated with %；V1It is the dosage of silver nitrate standard titration solution, unit ml；V0
It is the dosage of blank test silver nitrate standard titration solution, unit ml；C is the concentration of silver nitrate standard titration solution, unit
For mol/l；35.453 be the molal weight of chloride ion, unit g/mol；F is test liquid extension rate；M is sample mass, single
Position is g；100,1000 be unit conversion factor；Calculated result is indicated to 2 significant digits.
The present invention samples above-mentioned technical proposal, has the advantages that compared with prior art
1, edible salt is the substance for being dissolved in water entirely, and in the form of ions in water, and necessarily zwitterion keeps balance, no
It can then charge.The present invention is based on electrochemical equilibrium method as basic principle be meet it is actual, therefore compared with common calculating side
Method is simpler and effective.
2, the present invention is directly calculated according to after sampling to the related data of sample, operates more convenient, calculating
It is more efficient.
3, the present invention has positive impetus to the overall efficiency for driving entire edible salt detection industry, and to other classes
As parameter calculating provide referential solution.
Specific embodiment
The calculation method of sodium chloride content, includes the following steps: in a kind of edible salt
1) determination of moisture:
According to direct drying method, drying temperature is set as 140 DEG C ± 2 DEG C, it is dry to front and back twice of poor quality less than 5 ㎎,
As constant weight；
2) determination of chloride ion:
After the sample dissolution in step 1), uses potassium chromate as indicator, titrated with silver nitrate standard titration solution, measure chlorine
The content of ion.
Potassium chromate indicator of the invention are as follows: weigh 10g potassium chromate and be dissolved in 100ml water, it is molten to stir lower dropwise addition silver nitrate
Liquid is filtered to there is red-brown precipitation.
Step 2) of the invention specifically includes: weighing the smashed sample of 25g in 400ml beaker, is added 200ml's
Water, heating, is stirred with glass bar to whole dissolutions；It is transferred to 500ml volumetric flask after cooling, adds water constant volume, shakes up；Draw 25ml
Sample solution, with water constant volume, shakes up in 250ml volumetric flask；Then measurement is drawn the diluted sample solution of 25ml and is bored in 150ml
In shape bottle, 50ml is added water to, 4 drop potassium chromate indicator are added, are titrated while stirring with silver nitrate standard titration solution, until outstanding
Occurring stable salmon pink in turbid is terminal；Blank test is done simultaneously.
Chloride ion content is settled accounts according to formula (1) in sample:
Wherein X1It is chloride ion content in sample, is indicated with %；V1It is the dosage of silver nitrate standard titration solution, unit ml；V0
It is the dosage of blank test silver nitrate standard titration solution, unit ml；C is the concentration of silver nitrate standard titration solution, unit
For mol/l；35.453 be the molal weight of chloride ion, unit g/mol；F is test liquid extension rate；M is sample mass, single
Position is g；100,1000 be unit conversion factor；Calculated result is indicated to 2 significant digits.
The calculation method of sodium chloride content in edible salt based on electrochemical principle
The calculated result of the sodium chloride content of two batches sample obtained after calculating in upper table, can compare country for
The relevant criterion of sodium chloride content in edible salt, determines whether corresponding sample complies with standard.
Claims (4)
1. the calculation method of sodium chloride content in a kind of edible salt, it is characterised in that include the following steps:
1) determination of moisture:
According to direct drying method, drying temperature is set as 140 DEG C ± 2 DEG C, it is dry to front and back twice of poor quality less than 5 ㎎,
As constant weight；
2) determination of chloride ion:
After the sample dissolution in step 1), uses potassium chromate as indicator, titrated with silver nitrate standard titration solution, measure chlorine
The content of ion.
2. the calculation method of sodium chloride content in edible salt according to claim 1, it is characterised in that above-mentioned potassium chromate refers to
Show agent are as follows: weigh 10g potassium chromate and be dissolved in 100ml water, stir the lower silver nitrate solution that is added dropwise to there is red-brown precipitation, filter.
3. the calculation method of sodium chloride content in edible salt according to claim 1 or 2, it is characterised in that above-mentioned steps 2)
It specifically includes: weighing the smashed sample of 25g in 400ml beaker, the water of 200ml is added, heat, stirred with glass bar to complete
Portion's dissolution；It is transferred to 500ml volumetric flask after cooling, adds water constant volume, shakes up；25ml sample solution is drawn in 250ml volumetric flask,
With water constant volume, shake up；Then measurement draws the diluted sample solution of 25ml in 150ml conical flask, adds water to 50ml, is added 4
Potassium chromate indicator is dripped, is titrated while stirring with silver nitrate standard titration solution, until there is stable salmon pink in suspension
For terminal；Blank test is done simultaneously.
4. chloride ion content is settled accounts according to formula (1) in sample:
(1)
WhereinIt is chloride ion content in sample, is indicated with %；It is the dosage of silver nitrate standard titration solution, unit ml；It is the dosage of blank test silver nitrate standard titration solution, unit ml；It is the concentration of silver nitrate standard titration solution, it is single
Position is mol/l；It is the molal weight of chloride ion, unit g/mol；It is test liquid extension rate；It is sample matter
Amount, unit g；100,1000 be unit conversion factor；Calculated result is indicated to 2 significant digits.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910430694.5A CN110044892A (en) | 2019-05-22 | 2019-05-22 | The calculation method of sodium chloride content in a kind of edible salt |
| PCT/CN2020/071695 WO2020233150A1 (en) | 2019-05-22 | 2020-01-13 | Method for calculating content of sodium chloride in edible salt |
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| CN201910430694.5A CN110044892A (en) | 2019-05-22 | 2019-05-22 | The calculation method of sodium chloride content in a kind of edible salt |
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| WO (1) | WO2020233150A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455983A (en) * | 2019-08-28 | 2019-11-15 | 福州大学 | The detection method of chloride ion content in a kind of determining sea sand |
| WO2020233150A1 (en) * | 2019-05-22 | 2020-11-26 | 南京市产品质量监督检验院 | Method for calculating content of sodium chloride in edible salt |
| CN112763437A (en) * | 2020-12-25 | 2021-05-07 | 安徽瑞达健康产业有限公司 | Method for determining chloride ions in amino acid-N-formic anhydride |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358586B (en) * | 2021-04-12 | 2024-05-14 | 浙江花园新能源股份有限公司 | Novel determination method for trace chloride ion content in copper sulfate solution |
| CN113607665A (en) * | 2021-07-23 | 2021-11-05 | 华能国际电力股份有限公司济宁电厂 | Method for detecting impurity chloride in ammonia water |
| CN113970500B (en) * | 2021-10-27 | 2023-08-29 | 北京新风航天装备有限公司 | Rapid determination method for oil content of greasy dirt solid waste |
Citations (4)
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| JP2004184085A (en) * | 2002-11-29 | 2004-07-02 | Sumitomo Chem Co Ltd | Method of measuring concentration of available chlorine in aqueous sodium chloride solution containing available chlorine |
| CN105124100A (en) * | 2015-09-02 | 2015-12-09 | 华南农业大学 | Low-sugar candied jack fruit strips and making method thereof |
| CN105842236A (en) * | 2015-01-12 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Method for measuring sodium chloride content in sintering synergist through silver nitrate titration |
| CN107367502A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | The assay method of sodium chloride in a kind of industrial calcium chloride |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044892A (en) * | 2019-05-22 | 2019-07-23 | 南京市产品质量监督检验院 | The calculation method of sodium chloride content in a kind of edible salt |
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2019
- 2019-05-22 CN CN201910430694.5A patent/CN110044892A/en active Pending
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2020
- 2020-01-13 WO PCT/CN2020/071695 patent/WO2020233150A1/en active Application Filing
Patent Citations (4)
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|---|---|---|---|---|
| JP2004184085A (en) * | 2002-11-29 | 2004-07-02 | Sumitomo Chem Co Ltd | Method of measuring concentration of available chlorine in aqueous sodium chloride solution containing available chlorine |
| CN105842236A (en) * | 2015-01-12 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Method for measuring sodium chloride content in sintering synergist through silver nitrate titration |
| CN105124100A (en) * | 2015-09-02 | 2015-12-09 | 华南农业大学 | Low-sugar candied jack fruit strips and making method thereof |
| CN107367502A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | The assay method of sodium chloride in a kind of industrial calcium chloride |
Non-Patent Citations (1)
| Title |
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| 华人名共和国国家国家卫生与计划生育委员会: "《食品安全国家标准食盐指标的测定（GB 5009.42-2016）》", 31 August 2016 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020233150A1 (en) * | 2019-05-22 | 2020-11-26 | 南京市产品质量监督检验院 | Method for calculating content of sodium chloride in edible salt |
| CN110455983A (en) * | 2019-08-28 | 2019-11-15 | 福州大学 | The detection method of chloride ion content in a kind of determining sea sand |
| CN110455983B (en) * | 2019-08-28 | 2020-06-09 | 福州大学 | Detection method for determining content of chloride ions in sea sand |
| CN112763437A (en) * | 2020-12-25 | 2021-05-07 | 安徽瑞达健康产业有限公司 | Method for determining chloride ions in amino acid-N-formic anhydride |
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| WO2020233150A1 (en) | 2020-11-26 |
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