CN105572105A - Method for determining impurity elements such as bismuth, cadmium, cobalt, tellurium and antimony in copper magnetite through inductively coupled plasma emission spectrometry - Google Patents
Method for determining impurity elements such as bismuth, cadmium, cobalt, tellurium and antimony in copper magnetite through inductively coupled plasma emission spectrometry Download PDFInfo
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- CN105572105A CN105572105A CN201510916602.6A CN201510916602A CN105572105A CN 105572105 A CN105572105 A CN 105572105A CN 201510916602 A CN201510916602 A CN 201510916602A CN 105572105 A CN105572105 A CN 105572105A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
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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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- 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
- G01N1/44—Sample treatment involving radiation, e.g. heat
Abstract
The invention discloses a method for determining impurity elements such as bismuth, cadmium, cobalt, tellurium and antimony in copper magnetite through inductively coupled plasma emission spectrometry, and relates to the technical field of determination of impurities in the copper magnetite. Compared with the conventional acid-dissolution method for digesting samples, the method has the advantages of easiness in operation, short digestion period, low blank value, more complete digestion of components to be determined, and more accurate measurement results of the bismuth, cadmium, cobalt, tellurium and antimony due to treatment of the samples through an enclosed microwave digestion method; compared with atomic absorption spectroscopy and a chemical analysis method, the method has the advantages of high automation degree, simple flow, simultaneous and rapid determination of elements to be determined, analysis range being up to 0.00010-0.010 percent, and recovery rate being 98-102 percent; the method contributes to energy saving and environmental protection, and is suitable for analyzing a large scale of samples.
Description
Technical field
The present invention relates to impurity determination technical field in Copper Magnet ore deposit, specifically a kind of inductively coupled plasma emission spectrography measures the method for impurity element bismuth, cadmium, cobalt, tellurium, antimony in Copper Magnet ore deposit.
Background technology
Copper Magnet ore deposit is the magnetic iron ore of the rich iron of cupric, and be the primary raw material that copper and iron are smelted, the quality of its quality directly affects the performance of product, and the contamination therefore accurately understanding its impurity element is significant.For improving the checkability of impurity element in Copper Magnet ore deposit, shortening round of visits, needing the detection means of multielement simultaneous determination in research Copper Magnet ore deposit rapidly and efficiently.
At present, the Simultaneously test of multielement often adopts ICP-AES method, ICP-AES method METHOD FOR CONTINUOUS DETERMINATION constant, trace element has been reported, retrieval has " Chinese inorganic analytical chemistry " 2015 (1) Fan Lixin, Wang Jie deliver " ICP-AES (ICP-AES) measures the Al in Copper Magnet ore deposit, Ni, C μ, Mg, Pb, Zn6 kind element ", " metallurgical analysis " 2015-35 (6) Zhang Yanpu, Jiang Xiaoguang, " High frequency combustion infrared-adsorption method measures sulfur content in high-sulfur Copper Magnet ore deposit " that Han Feng delivers, non-ferrous metal industry standard YS/T1047.7-2015 " Copper Magnet ore deposit chemical analysis method the 7th part: copper, manganese, aluminium, calcium, magnesium, the mensuration ICP-AES of titanium and phosphorus amount ", but for impurity element bismuth in Copper Magnet ore deposit, cadmium, cobalt, tellurium, there is not been reported for the mensuration of antimony.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of method that inductively coupled plasma emission spectrography measures impurity element bismuth, cadmium, cobalt, tellurium, antimony in Copper Magnet ore deposit, clears up to solve existing skill solution the problem that the cycle is long, blank value is high, component to be measured is cleared up not exclusively, automaticity is low, flow process is numerous and diverse simply, mensuration is slow, be not suitable for the analysis of batch samples.
The technical scheme of technical solution problem of the present invention comprises the steps:
Prepared by solution:
Hydrochloric acid (1.1): ρ=1.19g/mL, top grade is pure;
Nitric acid (1.2): ρ=1.42g/mL, top grade is pure;
Hydrofluorite (1.3): ρ=1.16g/mL;
Dilute hydrochloric acid (1.5): choose top grade pure hydrochloric acid: water=1:1 (volume ratio) mixes in beaker;
Bismuth, cadmium, cobalt, tellurium, antimony typical shelf solution (1.6): solution concentration is 1000 μ g/mL, and the method specified by GB/T602 prepares the typical shelf solution of bismuth, cadmium, cobalt, tellurium, antimony element respectively;
Sampling and sample preparation:
Sample Copper Magnet ore deposit, will obtain sample and be placed in exsiccator in drying in oven and be cooled to room temperature, test portion is made, stand-by; The sampling of Copper Magnet ore deposit should according to standard method GB/T10322.1;
Prepare solution to be measured:
A takes 0.1 ~ 0.5g test portion in teflon counteracting tank;
B adds 10ml nitric acid, 5mL hydrofluorite in counteracting tank, tightens cover, is inserted by counteracting tank in microwave dissolver;
C is from one grade to third gear (0.5Mpa, 3min; 1.0MPa, 2min; 2.0MPa, 3min) timing gradient pressurization clear up, clear up complete, take out sample-dissolving pot, cooling after can opening;
Solution in counteracting tank moves in 100ml volumetric flask by d, rinses counteracting tank with water, and the liquid that counteracting tank is residual together moves in volumetric flask, adds 15ml dilute hydrochloric acid (1.5), is diluted to scale, and mixing is to be measured;
Preparation is with reference to solution:
A, in a series of teflon counteracting tank, adds 10ml nitric acid, 5mL hydrofluorite, inserts in microwave dissolver, tighten cover;
B is from one grade to third gear (0.5Mpa, 3min; 1.0MPa, 2min; 2.0MPa, 3min) timing gradient pressurization clear up, clear up complete, take out sample-dissolving pot, cooling after can opening;
C is by the blank solution after step b process, move in a series of 100mL volumetric flask, according to the content range of bismuth, cadmium, cobalt, tellurium, antimony in the sample learnt in advance, add the bismuth of desired body product, cadmium, cobalt, tellurium, antimony standard solution (1.6) in volumetric flask after, add 15ml dilute hydrochloric acid (1.5), add water constant volume, mixing, to be measured;
Drawing curve:
Adopt inductive coupling plasma emission spectrograph, measure the clean spectral intensity with reference to bismuth, cadmium, cobalt, tellurium, antimony in solution, with the mass concentration of bismuth, cadmium, cobalt, tellurium, antimony for horizontal ordinate, with the clean spectral intensity of bismuth, cadmium, cobalt, tellurium, antimony for ordinate, drawing curve; Purity of argon >=99.9% needed for inductive coupling plasma emission spectrograph;
Measure the mass concentration of element bismuth, cadmium, cobalt, tellurium, antimony in solution to be measured:
Adopt inductive coupling plasma emission spectrograph, measure the clean spectral intensity of bismuth in solution to be measured, cadmium, cobalt, tellurium, antimony, on corresponding working curve, find the mass concentration of respective element bismuth, cadmium, cobalt, tellurium, antimony with reference to the clean spectral intensity of element bismuth, cadmium, cobalt, tellurium, antimony in solution; Purity of argon >=99.9% needed for inductive coupling plasma emission spectrograph;
Computation and measurement result, obtains the content of element bismuth, cadmium, cobalt, tellurium, antimony in sample:
Be calculated as follows the mass percent W of element bismuth, cadmium, cobalt, tellurium, antimony in sample, numerical value represents with %:
In formula:
C
ithe mass concentration of element bismuth to be measured, cadmium, cobalt, tellurium, antimony from the sample solution that calibration curve checks in, unit is every milliliter of microgram;
C
0from the mass concentration with reference to element bismuth to be measured, cadmium, cobalt, tellurium, antimony solution that calibration curve checks in, unit is every milliliter of microgram;
V measures sample solution volume, unit milliliter;
M sample mass, unit of gram.
Described test portion preferred weight the best in quality is 0.2g furthermore.
The confirmation of detection limit, Determination Limit is by under the test condition drafted furthermore, measures 9 blank reagent solutions, and calculate standard deviation, draw detection limit with the standard deviation calculation method of 3 times, 5 times detect is limited to Determination Limit; Bismuth detects and is limited to: 0.00180 (μ g/mL), and Monitoring lower-cut is: 0.0090; Cadmium detects and is limited to: 0.00085 (μ g/mL), and Monitoring lower-cut is: 0.0043; Cobalt detects and is limited to: 0.00092 (μ g/mL), and Monitoring lower-cut is: 0.0046; Tellurium detects and is limited to: 0.00085 (μ g/mL), and Monitoring lower-cut is: 0.0039; Antimony detects and is limited to: 0.00092 (μ g/mL), Monitoring lower-cut is: 0.0032.
Beneficial effect of the present invention is:
1 by using airtight microwave digestion sample successful, and can not interference measurement result.
Before and after digestion procedure improves, the contrast of effect illustrates to principle: consult relevant data, standard is known, sample treatment is generally acid-soluble or alkali fusion.Because alkali fusion has a large amount of sodium salt to exist, make matrix concentration higher, have impact to measurement result.The present invention avoids when processing sample adopting alkali fusion as far as possible.
But according to the acid extracting of routine, owing to will use perchloric acid in acid dissolution, to environment, length consuming time, acid consumption are large and blank value is high.Only use hydrochloric acid, nitric acid, be difficult to the object reaching complete sample dissolution.Completely test portion can be dissolved by airtight microwave digestion.Its beneficial effect can be found out from following test figure form.Wherein routine refers to and only uses hydrochloric acid, nitric acid treatment sample; Improvement refers to use Microwave assisted sample digestion.
Table 1 sample decomposition method comparing result
As can be seen from Table 1, the lysate adopting conventional method to prepare can not open sample completely, causes the measurement result of element to be measured on the low side.Adopt the lysate of preparation of improving one's methods, because Microwave Digestion is in conjunction with high-pressure digestion and microwave fast heating two aspect performance, can ensure that sample dissolution is complete, again not by the restriction of experiment condition, be easy to promote.
Quality taken by 2 preferred test portions, improves experiment effect.
The selection of test portion quality should consider the representativeness of sample, to consider in test solution the requirements such as matrix concentration, detection limits again.0.1 taken respectively to same sample, 0.2,0.5g tests.Take 0.1g sample, the Element detection of low content less than; Take 0.5g sample, sample is too many, and process not exclusively, all makes measurement result on the low side.Result shows, takes that 0.2g sample can take into account the measurement range of high low content and detection limit simultaneously, sample dissolution effect is also relatively good.
3 omit iron Matrix phase, simplify detecting step, improve detection efficiency.
Copper Magnet ore deposit is except component to be measured, and principal ingredient is iron and silicon dioxide, and silicon dioxide removes, so contemplated by the invention the disturbed condition of iron to element to be measured by adding hydrofluorite volatilization.According to the inventive method, pipette and organize bismuth, cadmium, cobalt, tellurium, each 500 μ g of antimony standard solution in 100mL volumetric flask more, the Fe matrix adding 0mg/mL, 0.5mg/mL, 1.0mg/mL, 2.0mg/mL respectively carries out interference test, as shown in table 2.
Table 2 iron is to the interference of element to be measured
Result shows, element bismuth to be measured, cadmium, cobalt, tellurium, antimony do not have too large change along with the increase of matrix concentration, and the present invention does not adopt Matrix phase not only can not affect measuring accuracy, effectively can also reduce experimental procedure, simplifies experimentation.
4 Simultaneously test bismuth, cadmium, cobalt, tellurium, antimony can not form interference each other.
The essential element in Copper Magnet ore deposit has bismuth, cadmium, cobalt, tellurium, antimony etc., has part spectral line to disturb during spectroscopic assay, but other spectral line of choice of spectrum that can avoid interference.According to method of the present invention, the interference of the element that may exist in Copper Magnet ore deposit to tested element is investigated.Result shows, within the scope of the permissible error of ± 5%, measures bismuth, cadmium, cobalt, tellurium, the antimony of 2.00 μ g/mL respectively, other coexistence elements not interference measurement of 5 times amount.By selected wavelength, measure 5 kinds of elements, noiseless between each element.
5 microwave dissolvers effectively improve Detection results.
The use of microwave dissolver, can clear up the sample that many wet methods are difficult to clear up, and has saving and clears up the advantages such as reagent dosage, blank value is low, the cycle of clearing up is short, is a kind of reliable, effective sample-pretreating method.The present invention adopts closed microwave method to clear up sample, in diluted hydrochloric acid medium, with the bismuth in ICP-AES method Simultaneously test Copper Magnet ore deposit, cadmium, cobalt, tellurium, antimony 5 kinds of elements, detects precision and is significantly improved.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Owing to the present invention relates to accurate detection, so the often kind of sample chosen all takes according to most preferred sampling weight, selected sample is 0.2g, choose 3 kinds of representative samples altogether, be labeled as 1#, 2#, 3# respectively, 3 kinds of samples detected respectively, testing result in table 3 to table 7.
Prepared by solution:
Hydrochloric acid (1.1): ρ=1.19g/mL, top grade is pure;
Nitric acid (1.2): ρ=1.42g/mL, top grade is pure;
Hydrofluorite (1.3): ρ=1.16g/mL;
Dilute hydrochloric acid (1.5): choose top grade pure hydrochloric acid: water=1:1 (volume ratio) mixes in beaker;
Bismuth, cadmium, cobalt, tellurium, antimony typical shelf solution (1.6): solution concentration is 1000 μ g/mL, and the method specified by GB/T602 prepares the typical shelf solution of bismuth, cadmium, cobalt, tellurium, antimony element respectively;
Sampling and sample preparation:
Sample Copper Magnet ore deposit, will obtain sample and be placed in exsiccator in drying in oven and be cooled to room temperature, test portion is made, stand-by; The sampling of Copper Magnet ore deposit should according to standard method GB/T10322.1;
Prepare solution to be measured:
A takes 0.1 ~ 0.5g test portion in teflon counteracting tank;
B adds 10ml nitric acid, 5mL hydrofluorite in counteracting tank, tightens cover, is inserted by counteracting tank in microwave dissolver;
C is from one grade to third gear (0.5Mpa, 3min; 1.0MPa, 2min; 2.0MPa, 3min) timing gradient pressurization clear up, clear up complete, take out sample-dissolving pot, cooling after can opening;
Solution in counteracting tank moves in 100ml volumetric flask by d, rinses counteracting tank with water, and the liquid that counteracting tank is residual together moves in volumetric flask, adds 15ml dilute hydrochloric acid (1.5), is diluted to scale, and mixing is to be measured;
Preparation is with reference to solution:
A, in a series of teflon counteracting tank, adds 10ml nitric acid, 5mL hydrofluorite, inserts in microwave dissolver, tighten cover;
B is from one grade to third gear (0.5Mpa, 3min; 1.0MPa, 2min; 2.0MPa, 3min) timing gradient pressurization clear up, clear up complete, take out sample-dissolving pot, cooling after can opening;
C is by the blank solution after step b process, move in a series of 100mL volumetric flask, according to the content range of bismuth, cadmium, cobalt, tellurium, antimony in the sample learnt in advance, add the bismuth of desired body product, cadmium, cobalt, tellurium, antimony standard solution (1.6) in volumetric flask after, add 15ml dilute hydrochloric acid (1.5), add water constant volume, mixing, to be measured;
Drawing curve:
Adopt inductive coupling plasma emission spectrograph, measure the clean spectral intensity with reference to bismuth, cadmium, cobalt, tellurium, antimony in solution, with the mass concentration of bismuth, cadmium, cobalt, tellurium, antimony for horizontal ordinate, with the clean spectral intensity of bismuth, cadmium, cobalt, tellurium, antimony for ordinate, drawing curve; Purity of argon >=99.9% needed for inductive coupling plasma emission spectrograph;
Measure the mass concentration of element bismuth, cadmium, cobalt, tellurium, antimony in solution to be measured:
Adopt inductive coupling plasma emission spectrograph, measure the clean spectral intensity of bismuth in solution to be measured, cadmium, cobalt, tellurium, antimony, on corresponding working curve, find the mass concentration of respective element bismuth, cadmium, cobalt, tellurium, antimony with reference to the clean spectral intensity of element bismuth, cadmium, cobalt, tellurium, antimony in solution; Purity of argon >=99.9% needed for inductive coupling plasma emission spectrograph;
Computation and measurement result, obtains the content of element bismuth, cadmium, cobalt, tellurium, antimony in sample:
Be calculated as follows the mass percent W of element bismuth, cadmium, cobalt, tellurium, antimony in sample, numerical value represents with %:
In formula:
C
ithe mass concentration of element bismuth to be measured, cadmium, cobalt, tellurium, antimony from the sample solution that calibration curve checks in, unit is every milliliter of microgram;
C
0from the mass concentration with reference to element bismuth to be measured, cadmium, cobalt, tellurium, antimony solution that calibration curve checks in, unit is every milliliter of microgram;
V measures sample solution volume, unit milliliter;
M sample mass, unit of gram.
Described test portion preferred weight the best in quality is 0.2g furthermore.
The confirmation of detection limit, Determination Limit is by under the test condition drafted furthermore, measures 9 blank reagent solutions, and calculate standard deviation, draw detection limit with the standard deviation calculation method of 3 times, 5 times detect is limited to Determination Limit; Bismuth detects and is limited to: 0.00180 (μ g/mL), and Monitoring lower-cut is: 0.0090; Cadmium detects and is limited to: 0.00085 (μ g/mL), and Monitoring lower-cut is: 0.0043; Cobalt detects and is limited to: 0.00092 (μ g/mL), and Monitoring lower-cut is: 0.0046; Tellurium detects and is limited to: 0.00085 (μ g/mL), and Monitoring lower-cut is: 0.0039; Antimony detects and is limited to: 0.00092 (μ g/mL), Monitoring lower-cut is: 0.0032.
Bi content detection situation in each sample of table 3
Cd content detection situation in each sample of table 4
Co content detection situation in each sample of table 5
Te content detection situation in each sample of table 6
Sb content detection situation in each sample of table 7
Compared with clearing up sample with the acid extracting of routine, the present invention uses airtight microwave digestion method processing sample, simple to operate, the cycle of clearing up is short, blank value is low, component to be measured is cleared up more complete, makes the measurement result of bismuth, cadmium, cobalt, tellurium, antimony more accurate; Compared with atomic absorption spectrography (AAS), chemical analysis, automaticity is high, flow process is simple, can simultaneously, Fast Measurement element to be measured, analyst coverage can reach 0.00010% ~ 0.010%, and the recovery is 98% ~ 102%; The analysis of energy-saving and environmental protection, applicable batch samples.
Claims (3)
1. inductively coupled plasma emission spectrography measures a method for impurity element bismuth, cadmium, cobalt, tellurium, antimony in Copper Magnet ore deposit, it is characterized in that: described method comprises the steps:
Prepared by solution:
Hydrochloric acid (1.1): ρ=1.19g/mL, top grade is pure;
Nitric acid (1.2): ρ=1.42g/mL, top grade is pure;
Hydrofluorite (1.3): ρ=1.16g/mL;
Dilute hydrochloric acid (1.5): choose top grade pure hydrochloric acid: water=1:1(volume ratio) mix in beaker;
Bismuth, cadmium, cobalt, tellurium, antimony typical shelf solution (1.6): solution concentration is 1000 μ g/mL, and the method specified by GB/T602 prepares the typical shelf solution of bismuth, cadmium, cobalt, tellurium, antimony element respectively;
Sampling and sample preparation:
Sample Copper Magnet ore deposit, will obtain sample and be placed in exsiccator in drying in oven and be cooled to room temperature, test portion is made, stand-by; The sampling of Copper Magnet ore deposit should according to standard method GB/T10322.1;
Prepare solution to be measured:
A takes 0.1 ~ 0.5g test portion in teflon counteracting tank;
B adds 10ml nitric acid, 5mL hydrofluorite in counteracting tank, tightens cover, is inserted by counteracting tank in microwave dissolver;
C is from one grade to third gear (0.5Mpa, 3min; 1.0MPa, 2min; 2.0MPa, 3min) timing gradient pressurization clear up, clear up complete, take out sample-dissolving pot, cooling after can opening;
Solution in counteracting tank moves in 100ml volumetric flask by d, rinses counteracting tank with water, and the liquid that counteracting tank is residual together moves in volumetric flask, adds 15ml dilute hydrochloric acid (1.5), is diluted to scale, and mixing is to be measured;
Preparation is with reference to solution:
A, in a series of teflon counteracting tank, adds 10ml nitric acid, 5mL hydrofluorite, inserts in microwave dissolver, tighten cover;
B is from one grade to third gear (0.5Mpa, 3min; 1.0MPa, 2min; 2.0MPa, 3min) timing gradient pressurization clear up, clear up complete, take out sample-dissolving pot, cooling after can opening;
C is by the blank solution after step b process, move in a series of 100mL volumetric flask, according to the content range of bismuth, cadmium, cobalt, tellurium, antimony in the sample learnt in advance, add the bismuth of desired body product, cadmium, cobalt, tellurium, antimony standard solution (1.6) in volumetric flask after, add 15ml dilute hydrochloric acid (1.5), add water constant volume, mixing, to be measured;
Drawing curve:
Adopt inductive coupling plasma emission spectrograph, measure the clean spectral intensity with reference to bismuth, cadmium, cobalt, tellurium, antimony in solution, with the mass concentration of bismuth, cadmium, cobalt, tellurium, antimony for horizontal ordinate, with the clean spectral intensity of bismuth, cadmium, cobalt, tellurium, antimony for ordinate, drawing curve; Purity of argon >=99.9% needed for inductive coupling plasma emission spectrograph;
Measure the mass concentration of element bismuth, cadmium, cobalt, tellurium, antimony in solution to be measured:
Adopt inductive coupling plasma emission spectrograph, measure the clean spectral intensity of bismuth in solution to be measured, cadmium, cobalt, tellurium, antimony, on corresponding working curve, find the mass concentration of respective element bismuth, cadmium, cobalt, tellurium, antimony with reference to the clean spectral intensity of element bismuth, cadmium, cobalt, tellurium, antimony in solution; Purity of argon >=99.9% needed for inductive coupling plasma emission spectrograph;
Computation and measurement result, obtains the content of element bismuth, cadmium, cobalt, tellurium, antimony in sample:
Be calculated as follows the mass percent W of element bismuth, cadmium, cobalt, tellurium, antimony in sample, numerical value represents with %:
In formula:
C
ithe mass concentration of element bismuth to be measured, cadmium, cobalt, tellurium, antimony from the sample solution that calibration curve checks in, unit is every milliliter of microgram;
C
0from the mass concentration with reference to element bismuth to be measured, cadmium, cobalt, tellurium, antimony solution that calibration curve checks in, unit is every milliliter of microgram;
V measures sample solution volume, unit milliliter;
M sample mass, unit of gram.
2. a kind of inductively coupled plasma emission spectrography according to claim 1 measures the method for impurity element bismuth, cadmium, cobalt, tellurium, antimony in Copper Magnet ore deposit, it is characterized in that: described test portion preferred weight the best in quality is 0.2g.
3. a kind of inductively coupled plasma emission spectrography according to claim 1 measures the method for impurity element bismuth, cadmium, cobalt, tellurium, antimony in Copper Magnet ore deposit, it is characterized in that: the confirmation of detection limit, Determination Limit is by under the test condition drafted, measure 9 blank reagent solutions, calculate standard deviation, draw detection limit with the standard deviation calculation method of 3 times, 5 times detect is limited to Determination Limit;
Bismuth detects and is limited to: 0.00180(μ g/mL), Monitoring lower-cut is: 0.0090;
Cadmium detects and is limited to: 0.00085(μ g/mL), Monitoring lower-cut is: 0.0043;
Cobalt detects and is limited to: 0.00092(μ g/mL), Monitoring lower-cut is: 0.0046;
Tellurium detects and is limited to: 0.00085(μ g/mL), Monitoring lower-cut is: 0.0039;
Antimony detects and is limited to: 0.00092(μ g/mL), Monitoring lower-cut is: 0.0032.
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| CN105954263A (en) * | 2016-07-12 | 2016-09-21 | 湖南永清环保研究院有限责任公司 | {0><}0{>Method for measuring lead content of manganese slices by virtue of influence coefficient method |
| CN108287155A (en) * | 2017-01-10 | 2018-07-17 | 富士康(昆山)电脑接插件有限公司 | A kind of method of phosphorus content in efficient detection copper alloy |
| CN107655877A (en) * | 2017-07-31 | 2018-02-02 | 成都中建材光电材料有限公司 | A kind of method of impurity content in measure lead |
| CN108507858A (en) * | 2018-03-01 | 2018-09-07 | 白银有色集团股份有限公司 | A kind of method of impurity element aluminium, phosphorus, titanium in measurement nickel ore concentrate |
| CN108458918A (en) * | 2018-06-25 | 2018-08-28 | 广西冶金研究院有限公司 | A kind of method that micro-wave digestion-ICP-OES measures copper, lead, zinc, cadmium element in ion type rareearth slag |
| CN109682793A (en) * | 2019-01-22 | 2019-04-26 | 黄豪杰 | It is a kind of at the same measure lead in coupernick, cadmium content inductively coupled plasma emission spectrography rapid detection method |
| CN112051257A (en) * | 2019-06-06 | 2020-12-08 | 天津市茂联科技有限公司 | Method for rapidly detecting impurities in cobalt chloride |
| CN110320264A (en) * | 2019-08-09 | 2019-10-11 | 福建省农业科学院农业质量标准与检测技术研究所 | Inductively coupled plasma mass spectrometry measure marine sediment in lead, cadmium, chromium, copper, zinc, nickel content detection method |
| CN110749643A (en) * | 2019-11-25 | 2020-02-04 | 中国科学院长春应用化学研究所 | Method for measuring content of inorganic elements in Mongolian medicine mineral medicine magnet |
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