CN107290475A - A kind of preparation method of standard liquid - Google Patents
A kind of preparation method of standard liquid Download PDFInfo
- Publication number
- CN107290475A CN107290475A CN201610230553.5A CN201610230553A CN107290475A CN 107290475 A CN107290475 A CN 107290475A CN 201610230553 A CN201610230553 A CN 201610230553A CN 107290475 A CN107290475 A CN 107290475A
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- concentration value
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- standard liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a kind of preparation method of standard liquid, comprise the following steps：Concentration value prepares the first solution according to the rules；The first solution concentration value is adjusted repeatedly, it is more than normal concentration value * (1+0.1%) to its concentration value, in the range of normal concentration value * (1+0.5%), place after a period of time, its concentration value is adjusted again in the range of normal concentration value * (1 ± 0.1%), analysis definite value is carried out after qualified, finished product is then distributed into.Concentration of standard solution value prepared by the standard liquid preparation method calculates more convenient closer to theoretical value, when being used for user of service, and standard liquid is carried out into factorial praluction, used manpower and material resources sparingly, and saves and prepares cost.
Description
Technical field
The present invention relates to standard liquid field, a kind of more particularly to preparation method of standard liquid.
Background technology
At present, it is mostly according to GB/T 601-2002《Chemical reagent preparations of standard volumetric solutions》
Specified in the preparation method of standard liquid carry out the preparation of respective standard solution, but prepared according to national standard method
Concentration of standard solution value and the theoretical value deviation ratio used are larger, and decimal is relatively more during calculating, calculate number
It is tired, relatively it is adapted to laboratory and prepares in a small amount, is not suitable for factorial praluction.
The content of the invention
In order to solve above-mentioned the deficiencies in the prior art, the invention provides a kind of preparation method of standard liquid,
Concentration of standard solution value prepared by it is used more convenient closer to theoretical value for user of service.
The technical problems to be solved by the invention are achieved by the following technical programs：
A kind of preparation method of standard liquid, comprises the following steps：Concentration value prepares the first solution according to the rules；
The first solution concentration value is adjusted repeatedly, is more than normal concentration value * (1+0.1%) to its concentration value, it is dense less than providing
In the range of angle value * (1+0.5%), i.e. detectable concentration value meets：
0.1%≤(detectable concentration value-normal concentration value)/normal concentration value≤0.5%；The first qualified solution of detection, places one section
After time, then its concentration value is adjusted in the range of normal concentration value * (1 ± 0.1%), that is, meet：
| detectable concentration value-normal concentration value |/normal concentration value≤0.1%；Analysis definite value is carried out after qualified, finished product is then distributed into.
Further, the standard liquid is hydrochloric acid standard solution, sulfuric acid standard liquid, sodium thiosulfate mark
Any of quasi- solution, EDTA standard liquids, iodine standard solution.
The present invention has the advantages that：The closer reason of concentration of standard solution value prepared by this preparation method
By value, normal concentration value is C, and definite value result is in the range of C* (1 ± 0.1%), for user of service using more
It is convenient, standard liquid is subjected to factorial praluction, used manpower and material resources sparingly, saves and prepares cost.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the standard liquid preparation method of the present invention.
Embodiment
As described in Figure 1, the preparation method for a kind of standard liquid that the present invention is provided, it comprises the following steps：
(1) concentration value prepares the first solution according to the rules；
Formulate and require on standard liquid with reference to GB/T601-2002, first is prepared according to required normal concentration value
Solution, national standard GB/T601-2002 dose volume is 1L, and raw materials used is the original for preparing 1L standard liquids
Expect consumption, the present invention prepares the volume (V, unit L) of the first solution, and raw materials used amount is national standard 1L marks
The raw materials used amount of quasi- solution directly amplifies V times.
(2) the first solution concentration value is adjusted repeatedly, is more than normal concentration value to its concentration Testing value
* (1+0.1%), in the range of less than normal concentration value * (1+0.5%), that is, meet：
0.1%≤(detectable concentration value-normal concentration value)/normal concentration value≤0.5%；
If the first solution concentration value is higher than the 0.5% of normal concentration value, needs to add deionized water, turn down concentration；
If less than normal concentration value 0.1%, needing to add raw material, heightening concentration；Demarcated again, until test
As a result meet：0.1%≤(detectable concentration value-normal concentration value)/normal concentration value≤0.5%.
(3) satisfactory first solution after adjusting, is placed after a period of time, the performance of standard liquid
It is more stable, then its concentration value is adjusted to its Concentration Testing result in the range of normal concentration value * (1 ± 0.1%)；
Meet：| detectable concentration value-normal concentration value |/normal concentration value≤0.1%.
(4) qualified rear progress analysis definite value；Finished product inner wrapping unit is distributed into after definite value.
With reference to embodiment, the present invention will be described in detail.
Example 1 prepares 0.1mol/L hydrochloric acid standard solutions
(1) the first solution is prepared：Formulate and require on hydrochloric acid standard solution with reference to GB/T601-2002,
Output is amplified in proportion and prepared.Hydrochloric acid solution 20L is measured, in the container for injecting 3000L capacity,
Add 2000L distilled water to be diluted, obtain the first solution；
(2) regulation the first solution concentration value to its Concentration Testing result exists：
In the range of 0.1%≤(detectable concentration value-normal concentration value)/normal concentration value≤0.5%, i.e.,：0.1001mol/L
In the range of≤detectable concentration value≤0.1005mol/L.
(3) place after a period of time, then adjust its concentration value to its Concentration Testing result in normal concentration
In the range of 0.1 × (1 ± 0.1%) mol/L of value, that is, meet：
| detectable concentration value-normal concentration value |/normal concentration value≤0.1%.
(4) finished product inner wrapping unit is distributed into after qualified rear progress analysis definite value, definite value.
Hydrochloric acid standard solution, sulfuric acid standard liquid, sodium thiosulfate standard solution, EDTA standard liquids and iodine
The preparation method of standard liquid is identical, therefore can to represent other several standards molten for the preparation of hydrochloric acid standard solution
The preparation flow of liquid, is not being illustrated one by one.
Embodiment described above only expresses embodiments of the present invention, and it describes more specific and detailed, but
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as, as long as using equivalent substitution or equivalent transformation
The technical scheme that is obtained of form, all should fall within the scope and spirit of the invention.
Claims (2)
1. a kind of preparation method of standard liquid, comprises the following steps：Concentration value prepares the first solution according to the rules；
The first solution concentration value is adjusted repeatedly, is more than normal concentration value * (1+0.1%) to its concentration value, is less than
In the range of normal concentration value * (1+0.5%)；Place after a period of time, then adjust its concentration value to regulation
In the range of concentration value * (1 ± 0.1%)；Analysis definite value is carried out after qualified, finished product is then distributed into.
2. the preparation method of standard liquid according to claim 1, it is characterised in that the standard liquid
For hydrochloric acid standard solution, sulfuric acid standard liquid, sodium thiosulfate standard solution, EDTA standard liquids and
Any of iodine standard solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610230553.5A CN107290475A (en) | 2016-04-13 | 2016-04-13 | A kind of preparation method of standard liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610230553.5A CN107290475A (en) | 2016-04-13 | 2016-04-13 | A kind of preparation method of standard liquid |
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|---|---|
| CN107290475A true CN107290475A (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610230553.5A Pending CN107290475A (en) | 2016-04-13 | 2016-04-13 | A kind of preparation method of standard liquid |
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| CN (1) | CN107290475A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580310A (en) * | 2018-12-28 | 2019-04-05 | 深圳市博林达科技有限公司 | Naphthalene-methanol solution standard substance preparation method |
| CN109580309A (en) * | 2018-12-28 | 2019-04-05 | 深圳市博林达科技有限公司 | The preparation method of potassium nitrate standard solution |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336089A (en) * | 2013-06-13 | 2013-10-02 | 徐州工业职业技术学院 | Simple calibrating method of sodium thiosulfate standard solution |
-
2016
- 2016-04-13 CN CN201610230553.5A patent/CN107290475A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336089A (en) * | 2013-06-13 | 2013-10-02 | 徐州工业职业技术学院 | Simple calibrating method of sodium thiosulfate standard solution |
Non-Patent Citations (4)
| Title |
|---|
| 中华人民共和国国家经济贸易委员会: "HG/T 3696.1~3696.3-2002 无机化工产品 化学分析用标准滴定溶液、杂质标准溶液和制剂及制品的制备", 《中华人民共和国化工行业标准》 * |
| 中华人民共和国国家质量监督检验检疫总局: "GB/T 601-2002 化学试剂标准滴定溶液的制备", 《中华人民共和国国家标准》 * |
| 郭文玲: "如何减小标定硫代硫酸钠溶液误差", 《化工管理》 * |
| 钟振宇 等: "配制和标定硫代硫酸钠标准溶液时应注意的问题", 《广东化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580310A (en) * | 2018-12-28 | 2019-04-05 | 深圳市博林达科技有限公司 | Naphthalene-methanol solution standard substance preparation method |
| CN109580309A (en) * | 2018-12-28 | 2019-04-05 | 深圳市博林达科技有限公司 | The preparation method of potassium nitrate standard solution |
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Application publication date: 20171024 |