CN1229917A - Pretreating agent and pretreating process for detecting foreign matter in boracic acid by atomic absorption instrument - Google Patents
Pretreating agent and pretreating process for detecting foreign matter in boracic acid by atomic absorption instrument Download PDFInfo
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- CN1229917A CN1229917A CN 98112200 CN98112200A CN1229917A CN 1229917 A CN1229917 A CN 1229917A CN 98112200 CN98112200 CN 98112200 CN 98112200 A CN98112200 A CN 98112200A CN 1229917 A CN1229917 A CN 1229917A
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- boric acid
- atomic absorption
- pretreating agent
- pretreating
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Abstract
A pre-treating agent for atomic absorption instrument to detect the silicon as impurity in boric acid as neutron speed reducer and its pre-treating method are disclosed. It features use of purified water-alcohol pre-treating agent which can eliminate the interference of boric acid to measured small signal. Its advantages are low cost and higher correctness.
Description
The invention belongs to impurity content analysis technical field in the national defense industry neutron moderator boric acid.
Through the Searches of Patent Literature, the at present domestic example that does not still have impurity silicon achieving success in the use atomic absorption measuring boric acid, this is because when the impurity silicon in the boric acid is carried out assay determination, because the existence of boric acid, make that the signal value of silicon can not get analysis result much smaller than background signal in the mensuration process, so, do the place of this mensuration at needs, sample can only be delivered to states such as France, Japan goes to carry out, so both time-consuming, spend a large amount of foreign exchanges again, be unfavorable for the needs of our building of the four modernizations.
When the objective of the invention is at impurity silicon in adopting atomic absorption instrument analysis boric acid, boric acid is to the serious dried problem of scratching of the analysis of silicon, design and a kind ofly before analytical test, boric acid is handled, make it not produce dried pretreating agent of scratching and disposal route silicon.
The present invention is achieved in that sample thief 1.0000g is in plastic beaker, the sub-boiling distillation water that adds 10mL earlier, the top grade absolute ethyl alcohol that adds 5～40mL again, cover then and burn the bosom, shake gently, boric acid is dissolved in the pretreating agent that is made of sub-boiling distillation water and absolute ethyl alcohol fully, make it constitute mixed liquor, with standard addition method this mixed liquor is analyzed then, this technology on a large amount of method test bases preferred and under secret situation repeatedly checking draw, its experimental result repeatability is strong.
Through evidence, advantage of the present invention is, desired substance obtains easily, and through pre-service, the boric acid in the sample is converted into borate, and vapors away before silicon atomization, can satisfy the dried purpose of scratching of eliminating.Simultaneously, in pre-service, there is no any type of pollution, operate also easyly, can save the spending that a large amount of sample presentations is gone abroad.
Embodiment:
The present invention constitutes pretreating agent by 10mL sub-boiling distillation water and 5～40mL top grade absolute ethyl alcohol, by following method and step the boric acid sample is handled before impurity silicon is analyzed in to boric acid:
1. take by weighing boric acid sample 1.0000g earlier in plastic beaker;
2. the sub-boiling distillation water that adds 10mL;
3. add 25mL top grade absolute ethyl alcohol;
4. cover beaker, shake gently, boric acid is dissolved in the pretreating agent of sub-boiling distillation water and top grade absolute ethyl alcohol formation fully.
Like this, boric acid will be converted into borate, and vapor away before silicon atomization, therefore reach and get rid of dried purpose of scratching, with standard addition method mixed liquor is analyzed and just can be obtained satisfied result, sub-boiling distillation water noted earlier also can be ultrapure water, double distilled water etc.
Claims (3)
1. the pretreating agent and the preprocess method of impurity silicon in the atomic absorption measuring boric acid is characterized in that: described pretreating agent is that the top grade absolute ethyl alcohol by the sub-boiling distillation water of 10mL and 5～40mL constitutes.
2. the pretreating agent and the preprocess method of impurity silicon in the atomic absorption measuring boric acid, it is characterized in that: described preprocess method is: take by weighing 1.0000g boric acid sample in plastic beaker, the sub-boiling distillation water that adds 10mL earlier, the back adds the top grade absolute ethyl alcohol of 25mL, cover beaker then, shake gently, boric acid is dissolved in the pretreating agent fully.
3. according to the pretreating agent and the preprocess method of impurity silicon in the atomic absorption measuring boric acid described in claim 1 and 2, it is characterized in that described sub-boiling distillation water also can be ultrapure water and double distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98112200 CN1229917A (en) | 1998-08-25 | 1998-08-25 | Pretreating agent and pretreating process for detecting foreign matter in boracic acid by atomic absorption instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98112200 CN1229917A (en) | 1998-08-25 | 1998-08-25 | Pretreating agent and pretreating process for detecting foreign matter in boracic acid by atomic absorption instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1229917A true CN1229917A (en) | 1999-09-29 |
Family
ID=5222075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98112200 Pending CN1229917A (en) | 1998-08-25 | 1998-08-25 | Pretreating agent and pretreating process for detecting foreign matter in boracic acid by atomic absorption instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1229917A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928364A (en) * | 2012-10-25 | 2013-02-13 | 中国地质科学院矿产综合利用研究所 | Method for measuring trace impurity elements of sodium, magnesium, calcium, iron and lead in high-purity boric acid |
-
1998
- 1998-08-25 CN CN 98112200 patent/CN1229917A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928364A (en) * | 2012-10-25 | 2013-02-13 | 中国地质科学院矿产综合利用研究所 | Method for measuring trace impurity elements of sodium, magnesium, calcium, iron and lead in high-purity boric acid |
| CN102928364B (en) * | 2012-10-25 | 2014-09-10 | 中国地质科学院矿产综合利用研究所 | Method for measuring trace impurity elements of sodium, magnesium, calcium, iron and lead in high-purity boric acid |
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