CN102128739A - Testing method of heavy metal elements in paint coating - Google Patents

Testing method of heavy metal elements in paint coating Download PDF

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Publication number
CN102128739A
CN102128739A CN2010106076307A CN201010607630A CN102128739A CN 102128739 A CN102128739 A CN 102128739A CN 2010106076307 A CN2010106076307 A CN 2010106076307A CN 201010607630 A CN201010607630 A CN 201010607630A CN 102128739 A CN102128739 A CN 102128739A
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China
Prior art keywords
container
coating
heavy metal
metal elements
quality
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CN2010106076307A
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Chinese (zh)
Inventor
黄齐湘
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CONSUMER TESTING TECHNOLOGY Co Ltd
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CONSUMER TESTING TECHNOLOGY Co Ltd
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Priority to CN2010106076307A priority Critical patent/CN102128739A/en
Publication of CN102128739A publication Critical patent/CN102128739A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a testing method of heavy metal elements in a paint coating, which comprises the following steps of: (1) weighing a container; (2) placing a metal finished product into the container, and then adding an acetone solution; (3) placing the container into an ultrasonic cleaning instrument for ultrasonic cleaning; (4) taking out a metal base material without the coating, and placing a beaker with the coating into a drying oven for drying to obtain a coating sample without any base material; (5) weighing out the dried container, subtracting the weight of the original beaker by the weight of the container to obtain the weight of the coating sample, if a massive coating sample exists in the container, executing the step (6), or otherwise, testing with a computer; and (6) adding dichloromethane into the container firstly to be ultrasonically dissolved, then adding nitric acid, slowly adding hydrogen peroxide or hydrochloric acid in the dispelling process, cooling and filtering after the dispelling process is ended, and then testing with the computer. The invention can achieve the purposes of rapidly preparing paint samples, reducing pollution, lowering the testing cost of the samples and improving the accuracy of data.

Description

Painting layer determination of heavy metal elements method
Technical field
The present invention relates to a kind of determination of heavy metal elements method, especially relate to the painting layer determination of heavy metal elements method that a kind of coating that is applied on the metal product is handled.
Background technology
Paint mainly is made up of film forming matter, pigment, solvent, auxiliary agent four parts, and film forming matter is the basis of coating, as alkyd resin, acryl resin, chlorinated rubber resin, epoxy resin etc., the paint of these materials complexity in detecting the heavy metal digestion process has nothing in common with each other, and be difficult for identification, obtain and the coating in the finished product more is difficult for separation substrate.The management and control of heavy metals such as the lead in the painting layer is particularly emphasized in rules such as ASTM, CPSIA and California CP65, and the smaller 90PPm that reaches of limit value.
Traditional paint heavy metal method of testing mainly is: 1, shred behind the starting material paint drying and directly add acid or micro-wave digestion after sieving; 2, sieve after the coating on the finished product then scrapes with cutter and clear up.The shortcoming of above-mentioned prior art is: 1, the part dry paint generally adds acid and clears up the comparison difficulty, and the recovery is low, if the use microwave-assisted is cleared up and then expended time in longly, it is low to do sample efficient; 2, during micro-wave digestion owing to emit a large amount of gases in the paint digestion process, cause the danger of quick-fried filling easily, infringement equipment, cost is higher; 3, finished product is directly scraped from the surface and is got coating and just bring base material inevitably into, coating on the particularly tiny metal product, sampling is difficulty more, the influence of base material is bigger, the coating that obtains simultaneously step such as need sieve, it is bigger to introduce the risk of polluting, complex operation, efficient is low, and can't guarantee the accuracy of final data.
Summary of the invention
The defective that The present invention be directed to the existence of above-mentioned background technology provides a kind of painting layer determination of heavy metal elements method, this assay method can be produced paint sample fast, reduces and pollutes, and reduces the sample test cost, improve the accuracy of data, help painting series products total metals test analysis.
For achieving the above object, the invention discloses a kind of painting layer determination of heavy metal elements method, it comprises the steps:
Figure 2010106076307100002DEST_PATH_IMAGE002
, claim the quality of a container;
Figure 2010106076307100002DEST_PATH_IMAGE004
, the metal finished product is put into described container, add acetone soln then;
Figure 2010106076307100002DEST_PATH_IMAGE006
, described container is put into the ultrasonic cleaning of ultrasonic cleaning instrument;
Figure 2010106076307100002DEST_PATH_IMAGE008
, take out and to take off the metal base of coating, place the beaker that coating is housed baking oven to dry, promptly obtain coating sample without any base material;
Figure 2010106076307100002DEST_PATH_IMAGE010
, weigh up the container after the oven dry, claim this that quality of the container of coating sample is housed, the quality of this container deducts the quality of former beaker, then can get the quality of coating sample, if block coating sample is arranged in the described container, then enters step
Figure 2010106076307100002DEST_PATH_IMAGE012
, otherwise the test that promptly is available on the machine.
Figure 389433DEST_PATH_IMAGE012
, add the methylene chloride ultrasonic dissolution earlier in the described container after, add nitric acid again, slowly add hydrogen peroxide or hydrochloric acid in the digestion process, wait not have brown cigarette and produce promptly to finish and clear up, test promptly is available on the machine behind the cold filtration.
Further, described temperature of oven is 80 ℃.
Further, described step
Figure 192523DEST_PATH_IMAGE006
The ultrasonic cleaning instrument in the ultrasonic cleaning time be 2-3 minute.
Further, described metal finished product is buckle, rivet, ornaments or five metals parts.
Further, described container is a beaker.
In sum, painting layer determination of heavy metal elements method of the present invention just can realize producing fast paint sample by the cooperation of above steps, reduces and pollutes, and reduces the sample test cost, improve the accuracy of data, help painting series products total metals test analysis.
Embodiment
For further understanding feature of the present invention, technological means and the specific purposes that reached, function, the present invention is described in further detail below in conjunction with embodiment.
Painting layer determination of heavy metal elements method of the present invention comprises the steps:
, claim that a capacity is the quality of the beaker of 100ml;
Figure 755539DEST_PATH_IMAGE004
, get a metal finished product and place described beaker, add 20ml-30ml acetone, described half volume of metal finished product of submergence;
Figure 364375DEST_PATH_IMAGE006
, described beaker is put into ultrasonic cleaning instrument ultrasonic cleaning 2-3 minute, treat to stop after coating is taken off;
Figure 475551DEST_PATH_IMAGE008
, take out and to take off the metal base of coating, the beaker that coating is housed is passed through 80 ℃ hyperthermia drying in baking oven, promptly obtain coating sample without any base material;
Figure 486232DEST_PATH_IMAGE010
, weigh up the described beaker after the oven dry, claim the described quality that the beaker of coating sample is housed, the quality of this beaker deducts the quality of former beaker, then can get the quality of coating sample, if block coating sample is arranged in the described beaker, then enters step
Figure 890406DEST_PATH_IMAGE012
, otherwise the test that promptly is available on the machine.
Figure 986538DEST_PATH_IMAGE012
, add the 10ml red fuming nitric acid (RFNA) after adding 5ml methylene chloride ultrasonic dissolution, slowly add the hydrochloric acid of 2ml30% hydrogen peroxide or 5ml37% in the digestion process, wait not have brown cigarette and produce promptly to finish and clear up, cold filtration is settled to and waits for the machine of going up test in the 25ml volumetric flask.
The coating that the present invention is mainly used on the widget metal product is handled, and is primarily aimed at coating or varnish on the products such as buckle, rivet, ornaments, five metals parts.Use ultrasound wave to add auxiliary separating metal base material of acetone solvent and coating, avoid manually scraping consuming time, effort when getting widget, polluted defectives such as big, can reach the metal surface and just can make its complete effect of separating without excessive pressure with friction, and the time is short, the sample size of acquisition is big.
In sum, painting layer determination of heavy metal elements method of the present invention just can realize producing fast paint sample by the cooperation of above steps, reduces and pollutes, and reduces the sample test cost, improve the accuracy of data, help painting series products total metals test analysis.
The above embodiment has only expressed one embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as limitation of the scope of the invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with claims.

Claims (5)

1. a painting layer determination of heavy metal elements method is characterized in that: comprise the steps:
, claim the quality of a container;
Figure 136034DEST_PATH_IMAGE002
, the metal finished product is put into described container, add acetone soln then;
, described container is put into the ultrasonic cleaning of ultrasonic cleaning instrument;
Figure 323432DEST_PATH_IMAGE004
, take out and to take off the metal base of coating, place the beaker that coating is housed baking oven to dry, promptly obtain coating sample without any base material;
Figure 2010106076307100001DEST_PATH_IMAGE005
, weigh up the container after the oven dry, claim this that quality of the container of coating sample is housed, the quality of this container deducts the quality of former beaker, then can get the quality of coating sample, if block coating sample is arranged in the described container, then enters step
Figure 765432DEST_PATH_IMAGE006
, otherwise the test that promptly is available on the machine;
Figure 12874DEST_PATH_IMAGE006
, add the methylene chloride ultrasonic dissolution earlier in the described container after, add nitric acid again, slowly add hydrogen peroxide or hydrochloric acid in the digestion process, wait not have brown cigarette and produce promptly to finish and clear up, test promptly is available on the machine behind the cold filtration.
2. painting layer determination of heavy metal elements method according to claim 1 is characterized in that: described temperature of oven is 80 ℃.
3. painting layer determination of heavy metal elements method according to claim 1 and 2 is characterized in that: described step
Figure 83598DEST_PATH_IMAGE003
The ultrasonic cleaning instrument in the ultrasonic cleaning time be 2-3 minute.
4. painting layer determination of heavy metal elements method according to claim 1 and 2 is characterized in that: described metal finished product is buckle, rivet, ornaments or five metals parts.
5. painting layer determination of heavy metal elements method according to claim 1 and 2 is characterized in that: described container is a beaker.
CN2010106076307A 2010-12-28 2010-12-28 Testing method of heavy metal elements in paint coating Pending CN102128739A (en)

Priority Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106442065A (en) * 2016-10-28 2017-02-22 东莞出入境检验检疫局检验检疫综合技术中心 Solvent separation method for coating and soft rubber
CN109115709A (en) * 2018-10-23 2019-01-01 岭澳核电有限公司 Retention has the measuring method of iron content in the digestion procedure and nuclear power plant's cooling water of the filter membrane of iron
CN111044453A (en) * 2019-12-27 2020-04-21 浙江锋源氢能科技有限公司 Method for measuring binding force of coating on surface of substrate
CN114563486A (en) * 2022-03-16 2022-05-31 珠海格力电工有限公司 Solid content testing method for insulating paint

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106442065A (en) * 2016-10-28 2017-02-22 东莞出入境检验检疫局检验检疫综合技术中心 Solvent separation method for coating and soft rubber
CN106442065B (en) * 2016-10-28 2018-11-23 东莞出入境检验检疫局检验检疫综合技术中心 A method of it is separated for coating with flexible glue solvent
CN109115709A (en) * 2018-10-23 2019-01-01 岭澳核电有限公司 Retention has the measuring method of iron content in the digestion procedure and nuclear power plant's cooling water of the filter membrane of iron
CN111044453A (en) * 2019-12-27 2020-04-21 浙江锋源氢能科技有限公司 Method for measuring binding force of coating on surface of substrate
CN114563486A (en) * 2022-03-16 2022-05-31 珠海格力电工有限公司 Solid content testing method for insulating paint

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Application publication date: 20110720