CN102507475A - Method for selecting maximum absorption wavelength in detecting formaldehyde with acetylacetone spectrophotometry - Google Patents
Method for selecting maximum absorption wavelength in detecting formaldehyde with acetylacetone spectrophotometry Download PDFInfo
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- CN102507475A CN102507475A CN2011103399912A CN201110339991A CN102507475A CN 102507475 A CN102507475 A CN 102507475A CN 2011103399912 A CN2011103399912 A CN 2011103399912A CN 201110339991 A CN201110339991 A CN 201110339991A CN 102507475 A CN102507475 A CN 102507475A
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Abstract
The invention provides a method for selecting a maximum absorption wavelength in detecting formaldehyde with an acetylacetone spectrophotometry. The method comprises the following steps of: A, preparing a certain concentration of standard formaldehyde solution; B, using the standard solution to respectively prepare several different concentrations of formaldehyde solutions to be detected; C, respectively taking appropriate amount of formaldehyde solutions to be detected to test tubes, and respectively adding appropriate amount of acetylacetone solutions; D, respectively using 10mm of absorption cells to detect the absorbance As of several different concentrations of formaldehyde solutions to be detected at several different wavelengths of a spectrophotometer; E, using appropriate amount of distilled water and isometric acetylacetone for blank control, and respectively using the10mm of absorption cells to detect the absorbance A0 at several different wavelengths of the spectrophotometer; and F, respectively calculating the absorbance A of several formaldehyde solutions to be detected under different wavelengths, and determining the maximum absorption wavelength. The method has simple steps and convenience for operation, the maximum absorption wavelength is effectively found out, and therefore the accuracy of formaldehyde content detected by the acetylacetone spectrophotometry is ensured.
Description
Technical field
the present invention relates to the chemicals detection range, and particularly a kind of diacetone AAS detects the method for formaldehyde.
Background technology
formaldehyde is a kind of colourless, gas with strong specific stimulation property smell, as a kind of carcinogen, is the emphasis controlling object of many rules.If people live in the room of being polluted by formaldehyde for a long time, can cause immunity degradation, atoke ability or fetal anomaly, breathing problem, depression, diseases such as leukaemia and cancer.
The source of formaldehyde has three approach usually in
life: 1, airborne formaldehyde is mainly derived from commercial production and plastic components, rubber product, urea-formaldehyde foam, vehicle exhaust etc.; 2, indoor formaldehyde is mainly derived from ornament materials, as: timber, tackifier and wallpaper etc.; 3, formaldehyde also can be from cosmetics, antiseptic, printing-ink, paper, textile fibres etc.For the detection of formaldehyde, the diacetone AAS is the method that generally adopts both at home and abroad.The diacetone Spectrophotometric Determination Method of Formaldehyde has that antijamming capability is strong, simple to operate, advantage of high accuracy.But when selecting the colorimetric wavelength, different values is all arranged both at home and abroad, thereby the content of formaldehyde that the multi-wavelength measures is also inconsistent; Precision is difficult to guarantee, therefore, how selects optimum colorimetric wavelength; Thereby guarantee the high problem of accuracy of detection, become this technical field problem demanding prompt solution.
Summary of the invention
In order solving in the existing formaldehyde detection method multiple colorimetric wavelength to be arranged, thereby to cause the coarse problem of measurement result, the present invention proposes following technical scheme:
The system of selection of maximum absorption wavelength when a kind of diacetone AAS detects formaldehyde, this method may further comprise the steps:
A, get an amount of certain density formalin, it is formulated as the formaldehyde titer of 1500ug/mL;
B, use the 1500ug/mL that steps A obtains the formaldehyde titer respectively compound concentration be the formaldehyde of 0ug/mL, 15ug/mL, 30ug/mL, 100ug/mL liquid to be measured;
C, get an amount of four kinds of formaldehyde liquid to be measured to test tube respectively, and add an amount of diacetone solution respectively, shake test tube, it is mixed;
D, four test tubes are placed in (40 ± 2) ℃ water-bath colour developing (30 ± 5) min, take out then, normal temperature held (30 ± 5) min, respectively with the absorption cell of 10mm at spectrophotometer 412nm, 413nm, 414nm, 415nm wavelength mensuration absorbance A s;
E, add isopyknic diacetone with an amount of distilled water and make blank, measure absorbance A with the absorption cell of 10mm in spectrophotometer 412nm, 413nm, 414nm, 415nm wavelength respectively
0
F, through formula A=As-A
0
Calculate the absorbance A of four kinds of formaldehyde liquid to be measured of absorbance respectively, and from multi-group data, determine maximum absorption wavelength in 412nm, 413nm, 414nm, 415nm wavelength.
The beneficial effect that
the present invention brings is: the inventive method step is simple, and is easy to operate, effectively seeks out maximum absorption wavelength, thereby guarantees that the diacetone AAS detects the degree of accuracy of content of formaldehyde.
Embodiment
Set forth in the face of preferred embodiment of the present invention down in detail
, thereby so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
The system of selection of maximum absorption wavelength when a kind of diacetone AAS detects formaldehyde, this method may further comprise the steps:
A, to get 3.8mL concentration be 37% formalin, uses distilled water that it is diluted, and it is formulated as the formaldehyde titer of 1500ug/mL;
B, use the 1500ug/mL that steps A obtains the formaldehyde titer respectively in the volumetric flask of 500mL compound concentration be the formaldehyde of 0ug/mL, 15ug/mL, 30ug/mL, 100ug/mL liquid to be measured;
C, the single mark of use transfer pipet are got four kinds of formaldehyde liquid to be measured of 5mL respectively to test tube, and add the diacetone solution of 5mL respectively, shake test tube, and it is mixed;
D, four test tubes are placed in (40 ± 2) ℃ water-bath colour developing (30 ± 5) min, take out then, normal temperature held (30 ± 5) min, respectively with the absorption cell of 10mm at spectrophotometer 412nm, 413nm, 414nm, 415nm wavelength mensuration absorbance A s;
E, add isopyknic diacetone with an amount of distilled water and make blank, measure absorbance A with the absorption cell of 10mm in spectrophotometer 412nm, 413nm, 414nm, 415nm wavelength respectively
0
F, through formula A=As-A
0
Calculate the absorbance A of four kinds of formaldehyde liquid to be measured of absorbance under different wave length respectively; Obtain the absorbance under the difference colour developing wavelength shown in table one, the maximum absorption wavelength that therefrom can determine when surveying content of formaldehyde with the diacetone AAS should be chosen 413nm or 414nm.
Absorbance under the different colour developing of table one wavelength
 |
412nm | 413nm | 414nm | 415nm |
| 0μg/mL | 0.0289A | 0.0290A | 0.0290A | 0.0290A |
| 5μg/mL | 0.0824A | 0.0826A | 0.0826A | 0.0824A |
| 30μg/mL | 0.3236A | 0.3242A | 0.3243A | 0.3239A |
| 100μg/mL | 1.0277A | 1.0291A | 1.0291A | 1.0284A |
the above; Be merely embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the present invention disclosed, and variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (1)
1. the system of selection of maximum absorption wavelength when a diacetone AAS detects formaldehyde, it is characterized in that: this method may further comprise the steps:
A, get an amount of certain density formalin, it is formulated as the formaldehyde titer of 1500ug/mL;
B, use the 1500ug/mL that steps A obtains the formaldehyde titer respectively compound concentration be the formaldehyde of 0ug/mL, 15ug/mL, 30ug/mL, 100ug/mL liquid to be measured;
C, get an amount of four kinds of formaldehyde liquid to be measured to test tube respectively, and add an amount of diacetone solution respectively, shake test tube, it is mixed;
D, four test tubes are placed in (40 ± 2) ℃ water-bath colour developing (30 ± 5) min, take out then, normal temperature held (30 ± 5) min, respectively with the absorption cell of 10mm at spectrophotometer 412nm, 413nm, 414nm, 415nm wavelength mensuration absorbance A s;
E, add isopyknic diacetone with an amount of distilled water and make blank, measure absorbance A with the absorption cell of 10mm in spectrophotometer 412nm, 413nm, 414nm, 415nm wavelength respectively
0
F, through formula A=As-A
0Calculate the absorbance A of four kinds of formaldehyde liquid to be measured of absorbance respectively, and from multi-group data, determine maximum absorption wavelength in 412nm, 413nm, 414nm, 415nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103399912A CN102507475A (en) | 2011-11-02 | 2011-11-02 | Method for selecting maximum absorption wavelength in detecting formaldehyde with acetylacetone spectrophotometry |
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| CN2011103399912A CN102507475A (en) | 2011-11-02 | 2011-11-02 | Method for selecting maximum absorption wavelength in detecting formaldehyde with acetylacetone spectrophotometry |
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| CN102507475A true CN102507475A (en) | 2012-06-20 |
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| CN2011103399912A Pending CN102507475A (en) | 2011-11-02 | 2011-11-02 | Method for selecting maximum absorption wavelength in detecting formaldehyde with acetylacetone spectrophotometry |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472016A (en) * | 2013-09-17 | 2013-12-25 | 武汉分析仪器厂 | Spectrophotometric detector for detecting methanal and ammonia in air |
| CN104034682A (en) * | 2014-06-27 | 2014-09-10 | 宜特科技(昆山)电子有限公司 | Method for measuring formaldehyde emission amount of interior decoration material |
| CN104374726A (en) * | 2014-11-28 | 2015-02-25 | 苏州佑君环境科技有限公司 | Trichloro ethylene detection reagent and preparation method thereof |
| CN114324112A (en) * | 2021-12-29 | 2022-04-12 | 昆山矽崴环保设备有限公司 | Method for testing purifying effect of drinking water filter element |
| CN115165765A (en) * | 2022-06-01 | 2022-10-11 | 广州伊创科技股份有限公司 | Air formaldehyde online detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1731156A (en) * | 2005-08-19 | 2006-02-08 | 中国检验检疫科学研究院 | Method for quick detection of formaldehyde in food |
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| CN1731156A (en) * | 2005-08-19 | 2006-02-08 | 中国检验检疫科学研究院 | Method for quick detection of formaldehyde in food |
Non-Patent Citations (3)
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| 中国船舶重工集团公司第七一八研究所: "《水质 甲醛的测定 乙酰丙酮分光光度法 编制说明（征求意见稿）》", 11 April 2008 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472016A (en) * | 2013-09-17 | 2013-12-25 | 武汉分析仪器厂 | Spectrophotometric detector for detecting methanal and ammonia in air |
| CN104034682A (en) * | 2014-06-27 | 2014-09-10 | 宜特科技(昆山)电子有限公司 | Method for measuring formaldehyde emission amount of interior decoration material |
| CN104374726A (en) * | 2014-11-28 | 2015-02-25 | 苏州佑君环境科技有限公司 | Trichloro ethylene detection reagent and preparation method thereof |
| CN114324112A (en) * | 2021-12-29 | 2022-04-12 | 昆山矽崴环保设备有限公司 | Method for testing purifying effect of drinking water filter element |
| CN115165765A (en) * | 2022-06-01 | 2022-10-11 | 广州伊创科技股份有限公司 | Air formaldehyde online detection method |
| CN115165765B (en) * | 2022-06-01 | 2024-03-29 | 广州伊创科技股份有限公司 | Online detection method for air formaldehyde |
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Application publication date: 20120620 |