CN107101961B - A kind of method of Trace Metals Contents in aas determination pitch - Google Patents

A kind of method of Trace Metals Contents in aas determination pitch Download PDF

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CN107101961B
CN107101961B CN201710480358.2A CN201710480358A CN107101961B CN 107101961 B CN107101961 B CN 107101961B CN 201710480358 A CN201710480358 A CN 201710480358A CN 107101961 B CN107101961 B CN 107101961B
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concentration
sample
atomic absorption
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CN107101961A (en
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李晓民
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Gansu Communications Planning Survey And Design Institute Ltd By Share Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/3103Atomic absorption analysis

Abstract

The present invention relates to a kind of methods of Trace Metals Contents in aas determination pitch, method includes the following steps: (1) preparing standard serial solution: preparing the standard serial solution of copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium, vanadium, barium element;(2) instrumental method is established --- flame portion;(3) instrumental method is established --- graphite part;(4) establish standard curve: A using flame atomic absorption spectrophotometer establish copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium atomic absorption spectrum standard curve;B establishes the standard curve of vanadium, barium element using graphite Atomic Absorption Spectrometer;(5) sample to be tested is tested.Present system, accurate, reproducibility is high.

Description

A kind of method of Trace Metals Contents in aas determination pitch
Technical field
The present invention relates to micro gold in road engineering application field more particularly to a kind of aas determination pitch Belong to the method for constituent content.
Background technique
The not single substance of pitch, the mixture being made of multiple compounds, ingredient are extremely complex.It is chemically first From the point of view of element analysis, mainly it is made of two kinds of carbon (C), hydrogen (H) chemical elements, therefore also known as hydrocarbon.Usual petroleum drip Carbon and hydrogen content account for 98% ~ 99% in blueness, wherein carbon content is 84% ~ 87%, and hydrogen is 11% ~ 15%.In addition, also containing few in pitch The sulphur (S) of amount, nitrogen (N), oxygen (O) etc..In addition to above-mentioned five kinds of macroelements, all containing other yuan of denier in all pitch Element, content are usually no more than 0.01% ~ 0.3%.50 various trace elements are found in asphalt at present, they mainly include Sodium, nickel, iron, magnesium and calcium etc..Acid compound and metal ion in pitch etc., which combine, generates salt, these salts may be exactly Microelement is primarily present form.Although the content of metallic element is few, danger of the harmful metal elements to water body in pitch Evil Journal of Sex Research has relevant report both at home and abroad, mainly in use due to bituminous pavement, the continuous discharge of vehicle exhaust, Tire wear etc. enters metal in bituminous pavement, is precipitated with washing away for rainwater, causes highway surrounding water or soil Metallic pollution.Meanwhile minor metallic element present in research pitch has the processes such as processing, the production and transport of pitch Important theory and realistic meaning.In addition, different oil sources and different processing technologys, content of each microelement in pitch also have It is distinguished, law-analysing is carried out by the trace meter content to different brands pitch, plays the purpose for identifying pitch.State at present It inside there is no the method for systematically measuring minor metallic element in pitch, therefore establish the corresponding test method of each element, it is right It is of great significance in research pitch composition.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of systems, atomic absorption spectrography (AAS) accurate, reproducibility is high The method for measuring Trace Metals Contents in pitch.
To solve the above problems, minor metallic element contains in a kind of aas determination pitch of the present invention The method of amount, comprising the following steps:
(1) standard serial solution is prepared:
To buy in national non-ferrous metal and electronic material Institute of Analysis concentration is the copper of 1mg/mL, manganese member The nitric acid that element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium standard solution are 0.2% using mass concentration is right as medium It is diluted step by step, is configured to copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium member respectively by table 1 The standard serial solution of element;
Vanadium, barium member by purchase in national non-ferrous metal and electronic material Institute of Analysis concentration for 1mg/mL Element, the nitric acid for being 0.2% using mass concentration is medium, and compound concentration is the vanadium of 200ug/mL, concentration 80ug/mL respectively Barium element, be then configured to the standard serial solution of vanadium, barium element respectively by table 2;
The solution of preparation is stored in polytetrafluoroethylene (PTFE) bottle;
1 flame method of table measures the standard series concentration setting of constituent content
2 graphite method of table measures the standard series concentration setting of constituent content
(2) instrumental method is established --- flame portion:
1. access method is arranged;
2. sequential parameter is set;
3. spectrometer parameter setting;
4. flame parameters are set;
5. correction parameter is set:
Correction is clicked, into dialog box, method column is selected: general linear least square method, while being arranged the 5 of element to be measured A standard series concentration, all parameter settings finish, and return and summarize window, save, and click and determine;
(3) instrumental method is established --- graphite part:
The setting of I access method;
The setting of II sequential parameter;
III spectrometer parameter setting;
VI graphite furnace parameter setting;
The parameter setting of V correction:
Correction is clicked, into dialog box, primary standard concentration and other four standard systems are set separately in standard series concentration Column concentration, autosampler will be according to primary standard concentration automatic dilution other standards series;
VI sample introduction parameter setting:
Sample introduction is clicked, into dialog box, the sampling volume of autosampler is inputted, selects fixed volume in standard preparation;
After VII all rear parameter settings, preservation confirmation is carried out;
(4) standard curve is established:
A using flame atomic absorption spectrophotometer establish copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, The atomic absorption spectrum standard curve of chromium, method are as follows:
I start-up operation software opens air compressor, sets pressure as 0.25MPa;
II opens acetylene air valve, and pressure is adjusted in 0.06 ~ 0.08MPa;
III installs hollow cathode lamp, and lights preheating 15 minutes;
IV pins button ignition switch, until flame ignition;
V calls the analysis method of the step (3) respective element, and by the step, (1) resulting each standard serial solution is adopted After imbibition capillary suction, using standard serial solution concentration as abscissa, element absorbance is ordinate, establishes copper coin respectively Element, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium atomic absorption spectrum standard curve;
B establishes the standard curve of vanadium, barium element using graphite Atomic Absorption Spectrometer, and method is as follows:
I start-up operation software opens graphite furnace power supply;
II opens argon gas Steel cylinder gas valve, and adjustment pressure is 0.11 ~ 0.13MPa;Open simultaneously cooling circulating water system;
III fills deionized water in the bottle for handling liquid toilet or cosmetic substance of autosampler, installs hollow cathode lamp, and lights preheating 15 minutes;
IV adjusts position and the depth of autosampler sample introduction needle, it is ensured that is located at optimum position;
V calls the analysis method of the step (2) respective element, autosampler will draw the step (1) resulting V, Ba primary standard solution, autosampler automatic dilution other standards series, finally using standard serial solution concentration as abscissa, suction Luminosity is ordinate, establishes vanadium, barium Elements Atom absorption spectrum standard curve respectively;
(5) sample to be tested is tested:
A chooses different brands pitch, and every kind of pitch takes 3 parts, does collimation verification test;
The processing of b sample to be tested: every kind of 1 ~ 2g of brand pitch is taken to remove in porcelain crucible, being placed on electric furnace slow heating respectively Moisture is removed, temperature to sample is gradually risen and smokes clogging, burn out and is all carbonized;Then the porcelain crucible is placed in 800 ~ 900 DEG C 2 ~ 4h of calcination in Muffle furnace, taking-up are cooled to room temperature;Secondly 2 ~ 3mL mass concentration is added in the porcelain crucible for filling sample For 65% acid solution, it is complete to acid volatilization that sample is dissolved by heating on electric furnace;Finally with 1 ~ 2mL mass concentration be 0.05% ~ 0.1% acid solution dissolved residue needs to use membrane filtration, and be 0.05% ~ 0.1% with mass concentration if can not all dissolve Sample to be tested is settled in the volumetric flask of 25mL by acid solution, is shaken up;
The test of c sample to be tested
Using flame atomic absorption spectrophotometer measurement copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, Chromium content, method are as follows: after instrument is ready, by sample to be tested using after imbibition capillary suction, respectively obtaining each member Its constituent content can be obtained in the absorbance of element, the standard curve as corresponding to respective element;
Using graphite atomic absorption spectrometry vanadium, barium constituent content, method is as follows: autosampler will be certainly Sample to be tested in dynamic pipette samples disk, respectively obtains the absorbance of each element, can be obtained by the standard curve of respective element Constituent content.
Acid solution refers to one of nitric acid, sulfuric acid, hydrochloric acid in the step b.
The measurement of the chromium content replaces flame atomic absorption spectrometry using graphite atomic absorption spectrography (AAS).
Compared with the prior art, the present invention has the following advantages:
1, the present invention uses atomic absorption spectrography (AAS), by establishing the standard curve of each element, reaches quickly measurement pitch The purpose of middle constituent content.
2, sample treatment process of the present invention is simple, and Atomic Absorption Spectrometer accuracy is high, and data are reliable, and as a result repdocutbility is good It is good.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 is copper flame atomic absorption spectrometry standard curve.
Fig. 2 is manganese element flame atomic absorption spectrometry standard curve.
Fig. 3 is Zn-ef ficiency flame atomic absorption spectrometry standard curve.
Fig. 4 is nickel element flame atomic absorption spectrometry standard curve.
Fig. 5 is ferro element flame atomic absorption spectrometry standard curve.
Fig. 6 is calcium constituent flame atomic absorption spectrometry standard curve.
Fig. 7 is chromium flame atomic absorption spectrometry standard curve.
Fig. 8 is vanadium graphite atomic absorption spectrum standard curve.
Fig. 9 is barium element graphite atomic absorption spectrum standard curve.
Specific embodiment
A kind of method of Trace Metals Contents in aas determination pitch, comprising the following steps:
(1) standard serial solution is prepared:
To buy in national non-ferrous metal and electronic material Institute of Analysis concentration is the copper of 1mg/mL, manganese member The nitric acid that element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium standard solution are 0.2% using mass concentration is right as medium It is diluted step by step, is configured to copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium member respectively by table 1 The standard serial solution of element.
Vanadium, barium member by purchase in national non-ferrous metal and electronic material Institute of Analysis concentration for 1mg/mL Element, the nitric acid for being 0.2% using mass concentration is medium, and compound concentration is the vanadium of 200ug/mL, concentration 80ug/mL respectively Barium element, be then configured to the standard serial solution of vanadium, barium element respectively by table 2.
The solution of preparation is stored in polytetrafluoroethylene (PTFE) bottle.
1 flame method of table measures the standard series concentration setting of constituent content
2 graphite method of table measures the standard series concentration setting of constituent content
(2) instrumental method is established --- flame portion:
1. access method is arranged
It clicks the method in system operating software and sets button, method of ejecting dialog box is clicked and summarizes dialog box, input side Legitimate name, operator, select flame in the art;
2. sequential parameter is set
Sequence is clicked, occurrence sequence dialog box: and then click and change element, there is the periodic table of elements, select element to be measured, In movement, it is sequentially inserted into correction-sample blank-sample, the quantity of sample can input in sample number, and other movements can root According to being set;
3. spectrometer parameter setting
Spectrometer is clicked, spectrometer dialog box occurs, parameter setting generally has been displayed wherein, and it is right to click spectrometer dialog box The spectrometer parameter of each element can be checked and be edited to the symbol of element at upper angle;
4. flame parameters are set
Flame is clicked, into dialog box, default parameter setting is had been displayed wherein, without modifying;
5. correction parameter is set
Correction is clicked, into dialog box, method column is selected: general linear least square method, while being arranged the 5 of element to be measured A standard series concentration, is specifically shown in Table 1, and all parameter settings finish, and returns and summarizes window, saves, and clicks determination and is It can.
(3) instrumental method is established --- graphite part:
The setting of I access method
Click method sets button, and method of ejecting dialog box inputs title, selects graphite furnace, automatic sampling in the art Device selects FS95 autosampler;
The setting of II sequential parameter
Sequence is clicked, into dialog box, wherein the change, increase and other settings of element are identical as flame method.It clicks ASLG instructs window into autosampler loading, for the pendulum of the reagents such as sample on autosampler, standard solution to be arranged It puts;
III spectrometer parameter setting
Spectrometer is clicked, into dialog box, signal behavior peak height measurement method, background correction selects four line deuterium lamps, default Other parameters setting have been displayed wherein, it is not necessary to modify;
VI graphite furnace parameter setting
Into graphite furnace dialog box, the number below the options such as temperature, time is clicked, can be edited as needed corresponding dry The parameters such as temperature, the time of dry, ashing, atomization and removing, carry out generally according to the default value provided;Then selection is corresponding The model of graphite-pipe type, setting need to be consistent with the model of actual use;
The parameter setting of V correction
Correction is clicked, into dialog box, primary standard concentration and other four standard systems are set separately in standard series concentration Column concentration, is shown in Table 2, and autosampler will be according to primary standard concentration automatic dilution other standards series;
VI sample introduction parameter setting
Sample introduction is clicked, into dialog box, the sampling volume of autosampler is inputted, selects fixed volume in standard preparation;
After VII all rear parameter settings, preservation confirmation is carried out.
(4) standard curve is established:
A using flame atomic absorption spectrophotometer establish copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, The atomic absorption spectrum standard curve of chromium, method are as follows:
I start-up operation software opens air compressor, sets pressure as 0.25MPa;
II opens acetylene air valve, and pressure is adjusted in 0.06 ~ 0.08MPa;
III installs hollow cathode lamp, and lights preheating 15 minutes;
IV pins button ignition switch, until flame ignition;
V calls the analysis method of the step (2) respective element, and by the step, (1) resulting each standard serial solution is adopted After imbibition capillary suction, using standard serial solution concentration as abscissa, element absorbance is ordinate, establishes copper coin respectively Element, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium atomic absorption spectrum standard curve (referring to Fig. 1 ~ 7).
Copper flame atomic absorption spectrometry standard curve: y=0.1558x+0.0276, R2=0.9988。
Manganese element flame atomic absorption spectrometry standard curve: y=0.1451x-0.0014, R2=0.9964。
Zn-ef ficiency flame atomic absorption spectrometry standard curve: y=0.2875x+0.0038, R2=0.9995。
Nickel element flame atomic absorption spectrometry standard curve: y=0.083x+0.0096, R2=0.9983。
Ferro element flame atomic absorption spectrometry standard curve: y=0.0084x+0.0019, R2=0.9979。
Calcium constituent flame atomic absorption spectrometry standard curve: y=0.0255x+0.0075, R2=0.9958。
Chromium flame atomic absorption spectrometry standard curve: y=0.3766x+0.0099, R2=0.992。
B establishes the standard curve of vanadium, barium element using graphite Atomic Absorption Spectrometer, and method is as follows:
I start-up operation software opens graphite furnace power supply;
II opens argon gas Steel cylinder gas valve, and adjustment pressure is 0.11 ~ 0.13MPa;Open simultaneously cooling circulating water system;
III fills deionized water in the bottle for handling liquid toilet or cosmetic substance of autosampler, installs hollow cathode lamp, and lights preheating 15 minutes;
IV adjusts position and the depth of autosampler sample introduction needle, it is ensured that is located at optimum position;
The analysis method of V invocation step (3) respective element, autosampler is by aspiration step (1) resulting V, Ba primary standard Solution, autosampler automatic dilution other standards series, is finally vertical by abscissa, absorbance of standard serial solution concentration Coordinate establishes vanadium, barium Elements Atom absorption spectrum standard curve respectively (referring to Fig. 8 ~ 9).
Vanadium graphite atomic absorption spectrum standard curve: y=0.0024x+0.0185, R2=0.9989。
Barium element graphite atomic absorption spectrum standard curve: y=0.0027x-0.0132, R2=0.9943。
(5) sample to be tested is tested:
A chooses different brands pitch, and every kind of pitch takes 3 parts, does collimation verification test;
The processing of b sample to be tested: every kind of 1 ~ 2g of brand pitch is taken to remove in porcelain crucible, being placed on electric furnace slow heating respectively Moisture is removed, temperature to sample is gradually risen and smokes clogging, burn out and is all carbonized;Then porcelain crucible is placed in 800 ~ 900 DEG C of Muffles 2 ~ 4h of calcination in furnace, taking-up are cooled to room temperature;Secondly it is 65% that 2 ~ 3mL mass concentration is added in the porcelain crucible for filling sample It is complete to acid volatilization to dissolve by heating sample on electric furnace for acid solution;The acid for being finally 0.05% ~ 0.1% with 1 ~ 2mL mass concentration is molten Liquid dissolved residue needs if can not all dissolve with membrane filtration, and will be to for 0.05% ~ 0.1% acid solution with mass concentration Sample is settled in the volumetric flask of 25mL, is shaken up.
Wherein: acid solution refers to one of nitric acid, sulfuric acid, hydrochloric acid.
The test of c sample to be tested
Using flame atomic absorption spectrophotometer measurement copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, Chromium content, method are as follows: after instrument is ready, by sample to be tested using after imbibition capillary suction, respectively obtaining each member Its constituent content can be obtained in the absorbance of element, the standard curve as corresponding to respective element (referring to table 3 ~ 9).
3 copper test result of table
4 manganese element test result of table
5 Zn-ef ficiency test result of table
6 nickel element test result of table
7 ferro element test result of table
8 calcium constituent test result of table
9 chromium test result of table
Using graphite atomic absorption spectrometry vanadium, barium constituent content, method is as follows: autosampler will be certainly Sample to be tested in dynamic pipette samples disk, respectively obtains the absorbance of each element, can be obtained by the standard curve of respective element Constituent content (referring to table 10 ~ 11).
10 vanadium test result of table
11 barium element test result of table
The measurement of chromium content replaces flame atomic absorption spectrometry using graphite atomic absorption spectrography (AAS).
Standard deviation and the coefficient of variation indicate that one group of numerical value spreads out a kind of measurement idea of degree from average value.Standard deviation It is smaller with the coefficient of variation, these numerical value are represented close to average value.From table 2 ~ 8, table 10 ~ 11 each element test result it is found that Coefficient of variation maximum is 0.17 or so, and experimental result repdocutbility is preferable, and data are reliable.

Claims (3)

1. a kind of method of Trace Metals Contents in aas determination pitch, comprising the following steps:
(1) standard serial solution is prepared:
By purchase in national non-ferrous metal and electronic material Institute of Analysis concentration be the copper of 1mg/mL, manganese element, The nitric acid that Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium standard solution are 0.2% using mass concentration as medium, to its into Row dilutes step by step, is respectively configured to copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium by table 1 Standard serial solution;
To buy in national non-ferrous metal and electronic material Institute of Analysis concentration is the vanadium of 1mg/mL, barium elemental standards Solution, the nitric acid for being 0.2% using mass concentration is medium, and compound concentration is the vanadium solution of 200ug/mL respectively, and concentration is The barium Element Solution of 80ug/mL, is then configured to the standard serial solution of vanadium, barium element respectively by table 2;
The solution of preparation is stored in polytetrafluoroethylene (PTFE) bottle;
1 flame method of table measures the standard series concentration setting of constituent content
2 graphite method of table measures the standard series concentration setting of constituent content
(2) instrumental method is established --- flame portion:
1. access method is arranged;
2. sequential parameter is set;
3. spectrometer parameter setting;
4. flame parameters are set;
5. correction parameter is set:
Correction is clicked, into dialog box, method column is selected: general linear least square method, while 5 marks of element to be measured are set Quasi- series of concentrations, all parameter settings finish, and return and summarize window, save, and click and determine;
(3) instrumental method is established --- graphite part:
The setting of I access method;
The setting of II sequential parameter;
III spectrometer parameter setting;
VI graphite furnace parameter setting;
The parameter setting of V correction:
Correction is clicked, into dialog box, primary standard concentration is set separately in standard series concentration and other four standard series are dense Degree, autosampler will be according to primary standard concentration automatic dilution other standards series;
VI sample introduction parameter setting:
Sample introduction is clicked, into dialog box, the sampling volume of autosampler is inputted, selects fixed volume in standard preparation;
After VII all rear parameter settings, preservation confirmation is carried out;
(4) standard curve is established:
A establishes copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium member using flame atomic absorption spectrophotometer The atomic absorption spectrum standard curve of element, method are as follows:
I start-up operation software opens air compressor, sets pressure as 0.25MPa;
II opens acetylene air valve, and pressure is adjusted in 0.06 ~ 0.08MPa;
III installs hollow cathode lamp, and lights preheating 15 minutes;
IV pins button ignition switch, until flame ignition;
V calls the analysis method of the step (2) respective element, by the step (1) resulting each standard serial solution using inhaling After liquid capillary suction, using standard serial solution concentration as abscissa, element absorbance be ordinate, establish respectively copper, Manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium atomic absorption spectrum standard curve;
B establishes the standard curve of vanadium, barium element using graphite Atomic Absorption Spectrometer, and method is as follows:
I start-up operation software opens graphite furnace power supply;
II opens argon gas Steel cylinder gas valve, and adjustment pressure is 0.11 ~ 0.13MPa;Open simultaneously cooling circulating water system;
III fills deionized water in the bottle for handling liquid toilet or cosmetic substance of autosampler, installs hollow cathode lamp, and lights preheating 15 minutes;
IV adjusts position and the depth of autosampler sample introduction needle, it is ensured that is located at optimum position;
V calls the analysis method of the step (3) respective element, and autosampler will draw the step (1) resulting V, Ba master Standard solution, autosampler automatic dilution other standards series, finally using standard serial solution concentration as abscissa, absorbance For ordinate, vanadium, barium Elements Atom absorption spectrum standard curve are established respectively;
(5) sample to be tested is tested:
A chooses different brands pitch, and every kind of pitch takes 3 parts, does collimation verification test;
The processing of b sample to be tested: every kind of 1 ~ 2g of brand pitch is taken to remove water in porcelain crucible, being placed on electric furnace slow heating respectively Point, it gradually rises temperature to sample and smokes clogging, burn out and all carbonize;Then the porcelain crucible is placed in 800 ~ 900 DEG C of Muffles 2 ~ 4h of calcination in furnace, taking-up are cooled to room temperature;Secondly 2 ~ 3mL mass concentration is added in the porcelain crucible for filling sample is It is complete to acid volatilization to dissolve by heating sample on electric furnace for 65% acid solution;It is finally 0.05% ~ 0.1% with 1 ~ 2mL mass concentration Acid solution dissolved residue need if can not all dissolve with membrane filtration, and with mass concentration be 0.05% ~ 0.1% it is sour molten Sample to be tested is settled in the volumetric flask of 25mL by liquid, is shaken up;
The test of c sample to be tested
Using flame atomic absorption spectrophotometer measurement copper, manganese element, Zn-ef ficiency, nickel element, ferro element, calcium constituent, chromium member Cellulose content, method are as follows: after instrument is ready, by sample to be tested using after imbibition capillary suction, respectively obtaining each element Its constituent content can be obtained in absorbance, the standard curve as corresponding to respective element;
Using graphite atomic absorption spectrometry vanadium, barium constituent content, method is as follows: autosampler will be inhaled automatically The sample to be tested in sample disc is taken, the absorbance of each element is respectively obtained, element can be obtained by the standard curve of respective element Content.
2. the method for Trace Metals Contents in a kind of aas determination pitch as described in claim 1, Be characterized in that: acid solution refers to one of nitric acid, sulfuric acid, hydrochloric acid in the step b.
3. the method for Trace Metals Contents in a kind of aas determination pitch as described in claim 1, Be characterized in that: the measurement of the chromium content replaces flame atomic absorption spectrometry using graphite atomic absorption spectrography (AAS).
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