WO2008026313A1 - Réactif pour la détermination de la concentration de plomb et procédé de détermination de la concentration de plomb - Google Patents
Réactif pour la détermination de la concentration de plomb et procédé de détermination de la concentration de plomb Download PDFInfo
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- WO2008026313A1 WO2008026313A1 PCT/JP2007/000914 JP2007000914W WO2008026313A1 WO 2008026313 A1 WO2008026313 A1 WO 2008026313A1 JP 2007000914 W JP2007000914 W JP 2007000914W WO 2008026313 A1 WO2008026313 A1 WO 2008026313A1
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- lead concentration
- reagent
- lead
- porphyrin
- concentration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
Definitions
- the present invention relates to a lead concentration measuring reagent for accurately measuring the lead concentration in a sample solution in which zinc ions coexist, and a lead concentration measuring method using the reagent.
- lead is a soft and easy-to-process metal, it has been widely used in Japan as a material for water pipes until the 1980s. In the past, lead was said to have an oxide film on its surface, and it was said that it was difficult to dissolve. However, since the 1980s, the trace amount of elution has been seen as a problem, and water utilities have gradually changed from lead water pipes to stainless steel pipes. It has been switched. Lead is very toxic to the human body even in trace amounts, and it is known that the nervous system, anemia, headache, loss of appetite, lead colic and other toxic symptoms are also present. ⁇ It is also used for pottery and solder.
- incineration ash and fly ash discharged from incineration plants are often landfilled, and there are concerns about environmental pollution due to lead ions dissolved by rainwater in the surrounding area of the landfill. Therefore, before the incineration ash and fly ash are reclaimed, the administrative agency has been instructed to treat lead, which is a hazardous waste contained in the ash, and in order to prevent the dissolution of lead. Development of inhibitor, treatment method, measurement method of lead concentration in eluate, etc. are being studied.
- Colorimetric reagents used in this absorbance method include porphyrin compounds (Non-patent Document 1) and porphyrin derivatives such as porphyrin-introduced polymers (Patent Document 1). Porphyrin derivatives measure trace metals It is known that it can be used as a fixed reagent and lead concentration can be measured even in an alkaline solution such as eluate from incineration ash and fly ash.
- sample solutions such as eluate from incineration ash and fly ash contain zinc ions that react with porphyrin derivatives, which are colorimetric agents, in addition to lead. It was difficult to measure the exact lead concentration in the eluate from incineration ash and fly ash using a volphyrin derivative.
- Non-patent document 1 "22nd edition general catalog” Dojindo Laboratories, Inc., January 1990, p. 268-27 1
- Patent Document 1 US Patent No. 6437067
- Patent Document 2 Japanese Patent Laid-Open No. 9 _ 6 1 4 16
- Patent Document 3 WO / 2006/0 1 1 549
- the object of the present invention is to ensure accurate lead concentration even when zinc ions are contained in the sample solution when the lead concentration is measured by an absorbance method using a porphyrin derivative. It is an object to provide a reagent for measuring lead concentration that can be measured easily and a method for measuring lead concentration using the reagent.
- the present inventors searched for a masking agent for zinc ions when measuring a lead concentration in a sample solution in which zinc ions coexist using a porphyrin derivative as a colorimetric reagent by an absorbance method.
- EDDP ethylenediamine _N, N '—dipropionic acid
- ED DA ethylenediamine _N, N ′ —diacetic acid
- DAH TA 1, 6-diaminohexane_N, N, N ', N' — tetraacetic acid
- DAH TA 1, 6-diaminohexane_N, N, N ', N' — tetraacetic acid
- the present invention provides (A) a porphyrin derivative, and (B) ethylene diamine _N, N'-dipropionic acid, ethylene diamine _N, N'-divinegar.
- the present invention provides a reagent for measuring lead concentration containing an acid and at least one selected from 1,6-diaminohexane N, N, ′, N′-tetraacetic acid.
- the present invention provides a lead concentration measurement method for mixing the above-mentioned reagent for measuring lead concentration and a sample solution and measuring the absorbance thereof.
- the lead concentration measuring reagent of the present invention can accurately and accurately measure the lead concentration without being affected by zinc ions present in the sample solution. It is useful as a reagent for measuring lead concentration in environmental samples such as incineration ash, incineration fly ash, molten ash, and electric furnace dust (steel dust). Brief Description of Drawings
- FIG. 1 is a diagram showing a masking effect when various chelating agents are added.
- FIG. 2 is a diagram showing a masking effect when various types of glittering glazes are added.
- FIG. 3 is a graph showing the relationship between the change in added E D D soot concentration and the difference spectrum.
- FIG. 4 is a graph showing the relationship between masking agent concentration and peak height.
- FIG. 5 is a diagram showing the results of measuring lead concentration in a lead / zinc mixed solution.
- FIG. 6 is a graph showing the relationship between the change in added EDDA concentration and the difference spectrum.
- FIG. 7 is a graph showing the relationship between masking agent concentration and peak height.
- FIG. 8 is a diagram showing the results of measuring lead concentration in a lead / zinc mixed solution.
- FIG. 9 is a diagram showing a comparison of measured values of atomic absorption with a simple lead concentration measuring device.
- Examples of the porphyrin derivative (A) used in the present invention include those having a porphyrin skeleton and a change in the absorbance of light of a specific wavelength by reacting with lead ions.
- Such porphyrin derivatives include natural porphyrins such as uroporphyrin, coproporphyrin, and porphyrin, and 1 to 8 positions in the Fischer number method, as long as the absorbance of light of a specific wavelength changes by reacting with lead ions. And / or those having a substituent at the S-position and polymers having these structures.
- chlorin in which the pyrrole ring portion is reduced may be dihydrochlorin, or kurin having a substituent may be dihydrochlorin.
- As a specific porphyrin derivative As a specific porphyrin derivative,
- R represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms
- R 2 represents an alkyl group having 1 to 6 carbon atoms or a sulfoalkyl group
- R 3 and R 4 each represents a hydroxyl group, a strong loxyl group, a sulfonic acid residue, a phosphoric acid residue or a trialkylammonium group.
- porphyrin derivative represented by these, or its salt is mentioned.
- a porphyrin nucleus-introduced polymer obtained by radical copolymerization of a porphyrin compound represented by the formula (1) or (2) of the present invention with a vinylene monomer is produced by the method described in US Pat. No. 6437067.
- the two R groups in formula (1) may be the same or different. Examples of R include a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, and an isopropyl group.
- Porphyrin compounds represented by the formula (1) or (2) constituting the porphyrin nucleus-introduced polymer include, for example, proporphyrin IX in which R in the formula (1) is a hydrogen atom, formula (1) Protoporphyrin IX dimethyl ester, in which R is methyl group, and 5, 1 0, 1 5, 20-tetrax (4- (aryloxy) phenyl) represented by formula (2) —21 H, 23 H-porphyrin These porphyrin compounds can be obtained as commercial products.
- R in formula (1) is a hydrogen atom.
- Philin IX is preferred, and it is preferred to use the alkali metal salt, especially the disodium salt, in the production of the porphyrin nucleus-introduced polymer.
- Examples of the vinylene monomer constituting the porphyrin nucleus-introduced polymer include monomers having one or more vinylene groups, and specific examples of monomers having one vinylene group include acrylic Amide, methacrylic acid, acrylic acid, 5_hexenoic acid, arylamine, 3-butenoic acid, yS-methallyl alcohol, aryl alcohol, N, N-dimethylacrylamide, 1-vinylimidazole, 2 _Vinyl pyridine, 4 _Vinyl pyridine, chloro chloride, vinyl acetate, cucumber tonamide, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, trans 1,2-dichloroethylene, citraconic acid, mesaconic acid Angelic acid, tiglic acid, 2_methyl_2-butene and the like.
- monomers having one vinylene group include acrylic Amide, methacrylic acid, acrylic acid, 5_hexenoic acid, aryl
- acrylamide, N, N-dimethyl acrylamide, 1_vinyl imidazole, vinyl acetate, etc. are preferable, and acrylamide, N, N-dimethyl acrylamide are particularly preferable.
- the amount ratio of the porphyrin compound to be used and the vinylene monomer is a mass ratio of the porphyrin compound to the vinylene monomer, and is 1: 100 to 1: 1 0, 0 0 0, especially 1 : 2 00 to 1: 1, 0 0 0 is preferable.
- the molecular weight of the porphyrin nucleus-introduced polymer obtained by radical copolymerization of the porphyrin compound and vinylene monomer is not particularly limited, but from the viewpoint of the accuracy of lead concentration measurement, the average molecular weight by light scattering method is 50,000. ⁇ 500,000, and particularly preferably 100,000 to 1,000,000 are preferable.
- the lead concentration measuring reagent of the present invention can take a shape other than liquid.
- it can be molded into any shape suitable for the installation location and measurement system, such as a paste shape, a sheet shape, a film shape, a tube shape, and a bead shape.
- Compounds having two or more vinylene groups and acting as a crosslinking agent include N, N'-methylenebisacrylamide, N, N'-bisacryloylcystamine, divinylbenzene, ethylene glycol diacrylate, tetra Examples thereof include methylol methanetetraacrylate and trimethylolpropane triacrylate, and N, N'-methylenebisacrylamide, N, N'-bisacryloylcystamine and the like are preferable.
- the compound having two or more vinylene groups and acting as a crosslinking agent has a vinylene group.
- a monomer having two or more vinylene groups may be used alone.
- the content of the porphyrin nucleus-introduced polymer represented by the formula (1) or (2) in the reagent for measuring lead concentration is 1 to 60% by mass, more preferably 5 to 50% by mass, particularly 10 to 30% by mass is preferable in terms of the accuracy of measuring the concentration of lead contained in a trace amount in the sample solution.
- examples of the alkyl group represented by R 2 include a methyl group, an ethyl group, and an isopropyl group, and a methyl group is particularly preferable.
- a sulfo d_ 6 alkyl group such as a sulfopropyl group.
- R 3 and R 4 include a hydroxyl group, a strong lpoxyl group, and a sulfonic acid residue.
- Preferred examples of X 1 to X 4 sulfophenyl group, Sururocheniru group, trimethyl ammonium Niu Muhu enyl, hydroxyphenyl group, a force Rupokishifu Eniru group, phosphoryl Ruff enyl, methyl pyridinylalkyl ⁇ beam group, And sulfopropylpyridinium group.
- X 1 to X 4 have the substituent, and it is particularly preferable that four have the substituent.
- Examples of the salt of the compound of the formula (3) include alkali metal salts such as sodium salt and potassium salt, and acid addition salts such as hydrochloride.
- TPPS tetraphenyl 1 2 H, 23 H-borphyrin tetrasulfonic acid
- porphyrin derivatives represented by the formula (3) of the present invention a water-soluble porphyrin is more preferable, and such a porphyrin compound is a compound known as a colorimetric reagent for trace metals.
- the porphyrin derivative can be produced, for example, by sulfonating the phenyl group of tetraphenylporphyrin obtained by dehydration condensation of pyrrole and benzaldehyde and oxidation with p-chloranil in concentrated sulfuric acid (J onathan S L indsey, I rwin and S chrei ma n, H enry C. H su, P atrick C. K earney, and Anne M.
- the content of the porphyrin derivative represented by the formula (3) in the reagent for measuring lead concentration is 0.0 1 to 1 000 ⁇ ⁇ ⁇ ⁇ ⁇ / ⁇ _, and 0.1 to 500 ⁇ ⁇ ⁇ ⁇ ⁇ / ⁇ _, especially 1 to 100 m ⁇ I / L, is preferable in terms of the accuracy of measuring the concentration of lead contained in a trace amount in the sample solution.
- Ethylenediamine _N, N '—dipropionic acid, ethylenediamin-N, N ′ —diacetic acid and 1,6-diamineaminohexane N, N, N ′, N′_tetraacetic acid are known as chelating agents A compound. These are manufactured by chemical manufacturers and available as commercial products.
- Chelating agents containing these have been used for various applications by utilizing the property of forming complexes by binding to various metal ions. For example, sequestering of metal ions that impede fiber dyeing and detergent cleaning, softening water, removing harmful metal ions from wastewater, preventing the release of harmful metals, fertilizer components that increase the absorption efficiency of trace essential elements It is used for detoxification of harmful metal ions. These are usually used in a neutral solution, and since they are required to complex with all or part of metal ions depending on the application, selective complexation with individual metals is often not regarded as important. .
- the zinc ion masking agent in the reagent for measuring lead concentration of the present invention is particularly preferably ethylenediamine_N, N′-dipropionic acid.
- the content of ethylenediamine-N, N'-dipropionic acid in the reagent for measuring lead concentration including the porphyrin nucleus-introduced polymer is 0.1 mmol / L to 50 mmol / L, especially 1 to 20 mmo I / L is preferred.
- the content of ethylenediamine—N, N ′ —diacetic acid in the reagent for measuring lead concentration including the porphyrin-nucleated polymer is from 0.01 mmo I / L to 1 Ommo I / L, especially from 0.1 to 2 mmo I / L. L is preferred.
- 1, 6_diaminohexane _N, N, N ', N' — tetraacetic acid content in the reagent for measuring lead concentration containing porphyrin nucleopolymer is from 0.01 mmol / L to 1 mmol / L, particularly 0.1-4 mmo I / L is preferred.
- the content of ethylenediamine _N, N '—dipropionic acid in the reagent for measuring lead concentration containing the porphyrin derivative of formula (3) is 1 mmo I / L to 50 Omm o I / L, particularly 10 ⁇ 10 Ommo I / L is preferred.
- the content of ethylenediamine _N, N '—diacetic acid in the lead concentration measurement reagent containing the porphyrin derivative of formula (3) is 0.1 mmol / L to 50 mmo I / L, especially 1 to 20 mmo I / L. Is preferred.
- 1, 6_Diaminohexane ⁇ , ⁇ , N 'N' —tetraacetic acid content in the reagent for measuring lead concentration containing porphyrin derivative of formula (3) is 0.1 mmol / L ⁇ 50 mmo l / L, particularly 1 to 20 mmo I / L is preferred.
- the reagent for measuring lead concentration of the present invention may contain optional components that are usually used for the measurement of heavy metal ions in a solution as long as the effects of the present invention are not impaired. Can do.
- optional components include pH adjusters, surfactants, and other metal masking agents. These components may be stored separately or in a mixed state as appropriate.
- pH adjusters examples include N-cyclohexyl_3-aminopropanesulfonic acid, N-cyclohexyl-1-hydroxy-1-3-aminopropanesulfonic acid, sodium hydrogen carbonate, sodium carbonate, water Examples include sodium oxide.
- Examples of the surfactant include a cationic surfactant, an anionic surfactant, and a nonionic surfactant.
- Masking agents for other metals can be used, for example, for the reaction of lead ions with the reagent for measuring lead of the present invention, such as copper, force domum, calcium, iron, cobalt, chromium, magnesium, manganese, and nickel. Examples include metal ion masking agents.
- the pH of the reagent for measuring lead concentration of the present invention is preferably 6 to 13 and more preferably 6 to 12.5. Measurement using a lead concentration measurement reagent should be carried out at a pH of 9 to 13 of the mixture of the lead concentration measurement reagent and the sample solution, and 10 to 12.5 (25 ° C). Is preferred. If the lead concentration measurement reagent is in solid form, This is the pH after the reagent components are eluted. When the pH of the mixed solution is outside this range, it is preferable to adjust the pH of the lead concentration measuring reagent in advance with a pH adjusting agent so as to be within this range.
- the reagent for measuring lead concentration of the present invention can be in the form of a liquid, paste, sheet, film, tube, bead, etc., but it is liquid or sheet in terms of ease of use. Is preferred.
- the lead concentration measuring method of the present invention is performed by mixing the above-mentioned reagent for measuring lead concentration and a sample solution and measuring the absorbance. Prior to the measurement of absorbance, it is preferable to allow the reaction to proceed sufficiently, such as heating the mixed solution of the reagent and the sample solution.
- the heating temperature is preferably 30 to 90 ° C, and the heating time is preferably 1 to 60 minutes. Of these, the heating temperature is preferably 60 to 80 ° C and the heating time is 3 to 15 minutes from the viewpoint of accuracy, sensitivity, and throughput.
- the lead concentration contained in the sample solution using the lead concentration measuring reagent of the present invention is measured, for example, using a calibration curve using a standard sample by the absorbance method.
- the absorption wavelength in the measurement with an absorptiometer is preferably 3500 to 700 nm, more preferably 400 nm to 500 nm, and particularly preferably 466 nm.
- the sample for measuring the lead concentration is not particularly limited, but seawater, river water, tap water, industrial wastewater, incineration ash, incineration fly ash, molten ash, electric furnace dust (steel dust) or soil
- Environmental samples such as eluates, foods, beverages, agriculture, forestry and fishery products, plants, drugs, body fluids such as human or animal blood, saliva, semen, organs such as kidney, heart, brain, muscle, skin, nerve tissue, Examples include biological samples such as hair and feces.
- the sample solution measured using the present invention includes, in addition to the stock solutions of these samples, an extract obtained by appropriately extracting or concentrating / diluting the sample by a known method for measurement, a concentrating / diluting solution, and the like.
- the zinc ion concentration in the sample solution is preferably 1 O mg / L or less, particularly preferably 5 mg / L or less.
- Protoporphyrin IX disodium salt 9 1.1 mg and acrylamide 35.6 g were dissolved in dimethyl sulfoxide (DMSO) to a total volume of 490 mL.
- DMSO dimethyl sulfoxide
- the flask was transferred into a three-necked flask, 1 OmL of 500 mmo I / L of azobisisobutyronitrile (A I BN) was added, and the cap was immediately sealed. While stirring in a nitrogen atmosphere, the three-necked flask was immersed in a water bath adjusted to 60 ° C to initiate polymerization. After 4 hours, the obtained polymerization solution was added dropwise to a large amount of methanol as a precipitant. Aggregation ⁇ The precipitated polymer was recovered and the porphyrin nucleus-introduced polymer was isolated. After dissolving in pure water, it was added to methanol again and purified.
- DMSO dimethyl sulfoxide
- Borfilin nucleus-introduced polymer was dissolved in ultrapure water so that the absorbance at 466 nm (with blank as water) when diluted 2 times was between 0.7 and 0.8.
- This solution and a 1 mo I / L calcium chloride solution were mixed at a ratio of 64: 1 to obtain a porphyrin polymer-containing lead concentration measuring reagent.
- a lead / zinc mixed solution containing 2.5 ⁇ mo I / L of both lead and zinc and having a pH value adjusted to 12 using a CAPS buffer was prepared as a sample water.
- a porphyrin complexed with lead has a difference spectrum peak around 466 nm
- a porphyrin complexed with zinc has a difference spectrum peak around 4 15 nm. Therefore, when the lead-zinc mixed solution is reacted, peaks appear at both 415 nm and 466 nm, but the metal masked by the mixed chelating agent does not react with vorphyrin. Decrease. Therefore, the selectivity of the masking effect of the clearing agent can be evaluated by examining which peak is reduced.
- the pH of the mixed solution was 10 to 12.5 in all cases. After heating at 75 ° C for 5 minutes, the absorption spectrum was measured using an ultraviolet-visible spectrophotometer. Similarly, the absorption spectrum when the water-soluble porphyrin-containing lead concentration measurement reagent, lead-zinc mixed solution, and pure water were mixed and heated at the same ratio was also measured. Changes in absorption spectrum due to complex formation of porphyrin with lead and zinc by taking the difference from the reference spectrum (spectrum without metal), respectively (difference spectrum) Got.
- porphyrin complexed with lead has a peak of difference spectrum around 465 nm
- porphyrin complexed with zinc has a peak of difference spectrum around 423 nm.
- the selectivity of the chelating agent masking effect can be evaluated by examining which peak has been reduced.
- o-ph 0-Phenanthroline Figure 1 shows the difference spectra when pure water is added to each reagent and the chelating agents are added to the porphyrin polymer-containing lead concentration measurement reagent. Since the concentration at which the masking effect appears differs depending on the chelating agent, the difference spectrum was shown when the zinc or lead peak changed. Crown ethers (15Crown5 and 18Crown6) are considered to be selective metal scavengers, but their solubility in water systems was not recognized.
- o_Phenant Mouth Phosphorus is known as a zinc masking agent in the neutral range, but no masking effect was observed in the alkaline range, but rather contributed to an increase in the zinc peak.
- Fig. 2 shows the difference spectra when pure water is added to the water-soluble porphyrin-containing lead concentration measuring reagent and each chelating agent is added. No masking effect was observed for crown ethers and NTP. o_Phenant mouth Phosphorus and imidazole contributed to an increase in the peak of zinc, and no effect as a masking agent was observed.
- DAH TA, ED DA, and EDDP reduced not only zinc but also the lead peak and masked both zinc and lead, whereas when DAH TA, ED DA, and EDDP were added Only the zinc peak was greatly reduced, indicating that the zinc was selectively masked.
- DAH TA, ED DA, and EDDP are selectively combined with zinc in a lead-zinc mixed solution, but lead is not only zinc but is added when the concentration is extremely high or the solution to be measured contains only lead. Is also expected to be masked. Therefore, we prepared the lead concentration measurement reagent containing porphyrin polymer of the present invention containing DAH TA, ED DA, and EDDP with different concentrations, and measured the solution containing only lead using a simple lead concentration measurement device. .
- the simple lead concentration measuring device contains a small spectrophotometer and a heater to heat the cell, and the absorption spectrum immediately after the cell is set in the device and heating for 5 minutes (75 ° By C), the absorption spectrum after promoting the reaction in the solution in the cell can be obtained.
- this time difference spectrum a peak corresponding to the lead concentration is observed at 466 nm, and the lead concentration is calculated by comparing with the time difference spectrum when a lead solution with a known concentration is reacted. Note that these calculations are executed after appropriate standardization processing has been applied to the absorption spectrum by dedicated software.
- FIG. 3 shows, as an example, a difference spectrum obtained by changing the concentration of EDDA.
- the peak height derived from lead decreased as the concentration of E D D A increased.
- Figure 4 shows the changes in peak height when the concentrations of D A H T A, E D DA, and E D D P are changed.
- the peak height decreased according to the concentration of the masking agent. From this, it was shown that the masking agent cannot be added at an unnecessarily high concentration, and it is necessary to add an appropriate amount in consideration of acceptable measurement sensitivity. It was also found that the peak height decreased little even when E D D P was added at a high concentration. In this case, it was judged that the maximum concentration that can be added was 2 mM for DAH TA, 4 mM for EDDA, and about 10 mM for EDDP. If it is clear that the sample side contains zinc, it can be dealt with by adding a higher concentration masking agent.
- Borfilin nucleus-introduced polymer was dissolved in ultrapure water so that the absorbance at 466 nm (with blank as water) when diluted 2 times was between 0.7 and 0.8.
- This solution and 1 mo I / L calcium chloride solution were mixed at a ratio of 65: 1.
- this solution is mixed with 15 mmo I / L 08-11-1cho aqueous solution at a ratio of 10: 1 (volume ratio) to prepare the porphyrin polymer-containing lead concentration measuring reagent (pH 10) of the present invention. did.
- a porphyrin polymer-containing lead concentration measuring reagent (pH 10) of the present invention in which a 6 mmo I / L E DDA aqueous solution was mixed at 10: 1 (volume ratio) was also prepared.
- a reagent for measuring the concentration of Borphyrin polymer lead of the present invention in which 5 Ommo I / L E D D P aqueous solution was mixed at 10: 1 (volume ratio) was prepared (pH 8).
- a comparative porphyrin polymer-containing reagent for measuring lead concentration (pH 5.4) in which pure water was mixed at 10: 1 (volume ratio) was also prepared.
- Zinc sulfate was dissolved in an alkaline aqueous solution (pH 12) containing CAPS buffer to prepare zinc aqueous solutions with different concentrations. About 50 mg / L of this aqueous zinc solution By adding 1% by mass of lead aqueous solution, the lead concentration is the same (0.52 mg / L) and the zinc concentration (0 to about 10 mg / L) is different. Sample water was used.
- a simple lead concentration measuring device was used for measuring the lead concentration in the test water using the porphyrin polymer-containing lead concentration measuring reagent of the present invention.
- the present porphyrin polymer-containing lead concentration measuring reagent 500 1_ and test water 500 1_ were mixed.
- the pH of the mixed solution was 10 to 12.5 in all cases.
- the lead concentration was measured by setting it on a simple lead concentration measuring device.
- the lead and zinc concentrations in the same sample were measured using an atomic absorption photometer.
- Fig. 5 shows the measurement results of a lead-zinc mixed solution using a simple lead concentration measurement device.
- the horizontal axis represents the coexisting zinc concentration measured by an atomic absorption photometer.
- a comparative porphyrin polymer-containing lead concentration measurement reagent that does not contain a masking agent was used, the calculated lead concentration decreased dramatically as the coexisting zinc concentration increased. Therefore, the lead concentration could not be measured correctly even if the coexisting zinc was low.
- lead concentration measurement reagents containing masking agents such as DAHTA, EDDA, and EDDP were used, the calculated lead concentration tended to maintain its original value even when zinc was present.
- the acceptable coexisting zinc concentration is about 1 mg / L or less when using the reagent for measuring the lead concentration of vorphiline polymer for comparison.
- the porphyrin polymer-containing lead concentration measurement reagent containing a masking agent it was possible to measure the lead concentration even in the presence of zinc up to about 5 mg / L.
- the excess of DAHTA, EDDA, and EDDP is also present in the water soluble volphyrin-containing lead concentration measurement reagent. Such addition is expected to mask lead.
- a water-soluble porphyrin-containing lead concentration measuring reagent (pH 6 to 12.5) of the present invention containing D D P) was prepared.
- Reagent for measuring lead concentration containing water-soluble volfilin of the present invention 250! _ was mixed with 250 L of 0.3 mg / L aqueous lead solution dissolved in CAPS buffer solution (pH 1 2). The pH after mixing was 10 to 12.5 in all cases.
- the absorption spectrum after heating at 75 ° C for 5 minutes was measured using an ultraviolet-visible spectrophotometer. The absorption spectrum when a solution containing no metal was used as the test water was also measured, and a difference spectrum was obtained.
- FIG. 6 shows, as an example, a difference spectrum obtained by changing the concentration of DAH TA.
- the peak height derived from lead decreased as the concentration of DAHTA increased.
- Figure 7 shows the changes in peak height when the concentrations of DA HTA, EDDA, and E D D P are changed.
- the peak height decreased according to the concentration of the masking agent. This indicates that the masking agent cannot be added at an unnecessarily high concentration, and that an appropriate amount needs to be added in consideration of acceptable measurement sensitivity. It was also found that the peak height decreased little even when EDDP was added at a high concentration. In this case, it was determined that DA HTA and EDDA were 20 mM, and EDDP was about 100 mM. If it is clear that the sample side contains zinc, it can be dealt with by adding a higher concentration masking agent.
- Example 5 Lead using a water-soluble volphyrin-containing lead concentration measuring reagent containing a masking agent Measurement of lead concentration in zinc mixed solution
- CAPS buffer solution (pH 1 2) containing 30 M water-soluble porphyrin TP PS, 4.4 mM calcium chloride, and 1 OmM 0-8 1-1 chohachi for the measurement of lead concentration of water-soluble porphyrin according to the present invention. Reagent was used. Similarly, CAPS buffer containing 30 M TP PS, 4.4 mM calcium chloride, and 1 OmM EDDA (p H 1 2) was prepared and used as a reagent for measuring lead concentration of water-soluble porphyrin in the present invention.
- a CAPS buffer solution pH 12 containing 30 UM, water-soluble porphyrin TP PS, 4.4 mM calcium chloride, and 4 OmM EDDP was prepared as a reagent for measuring lead concentration containing water-soluble porphyrin of the present invention.
- Zinc sulfate was dissolved in an alkaline solution containing CAPS buffer to prepare zinc solutions with different concentrations.
- the lead concentration is the same (0.46 mg / L) and the zinc concentration (0 to about 1 Omg / L) is reduced.
- Different alkaline lead / zinc mixed solutions were prepared and used as test water.
- a sampling tube 250 L of the water-soluble porphyrin-containing lead concentration measuring reagent of the present invention and 250 L of test water were mixed.
- the pH of the mixed solution was 10 to 12.5 in all cases. Heated at 75 ° C for 5 minutes.
- the mixture was transferred to each 1 cm cuvette and the absorption spectrum was measured using a spectrophotometer.
- the difference spectrum was obtained by taking the difference between this spectrum and the absorption spectrum when reacted with an aqueous solution containing no metal.
- the lead concentration was calculated by substituting the value of 466 nm into a calibration curve obtained from a sample with known concentration. At the same time, the lead concentration and zinc concentration in the same sample were measured using an atomic absorption photometer.
- Figure 8 shows the measurement results of the lead / zinc mixed solution.
- the horizontal axis represents the coexisting zinc concentration measured by an atomic absorption photometer.
- a comparative water-soluble porphyrin-containing lead concentration measurement reagent that does not contain a masking agent was used, the calculated lead concentration decreased rapidly as the coexisting zinc concentration increased. Therefore, the lead concentration could not be measured correctly even if the coexisting zinc was low.
- Method, DAHTA, EDDA, EDDP containing water-soluble volphyrin-containing lead concentrate When using the reagent for measuring the degree, even if zinc coexists, the calculated lead concentration tends to maintain the original value, and DAHTA and EDDP were particularly effective.
- the acceptable coexisting zinc concentration is about 1 mg / L or less when using the comparative water-soluble porphyrin-containing lead concentration measuring reagent.
- the lead concentration can be measured even if zinc up to about 1 Omg / L is present. was possible.
- Example 6 Measurement of ash eluate using a lead concentration measurement with a borphyrin polymer containing a zinc masking agent
- aqueous solution containing each porphyrin-introduced polymer, 13 mM calcium chloride, and 1.8 mM EDDP was prepared and used as a reagent for measuring lead concentration (pH 8) containing a Borphyrin polymer containing a zinc masking agent.
- the amount of porphyrin nucleated polymer is such that the absorbance when diluted twice with pure water is between 0.7 and 0.8.
- the lead concentration in the ash eluate was measured using a porphyrin polymer-containing lead concentration measuring reagent containing the zinc masking agent of the present invention and a simple lead concentration measuring device.
- the pH of the mixed solution of the volfilin polymer-containing lead concentration measurement reagent and ash eluate was 10 to 12.5.
- the lead concentration was measured by atomic absorption.
- the sample without masking agent Measurement using a luffilin polymer-containing lead concentration measuring reagent was also performed.
- Figure 9 shows the correlation between the values measured by the simple lead concentration measuring device and the values measured by atomic absorption. Although a tendency to calculate a lower value than the atomic absorption was recognized overall, the tendency to approach the measured value by atomic absorption was recognized when the masking agent was added compared to the case where the masking agent was not included. It was.
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CN2007800317823A CN101506651B (zh) | 2006-08-28 | 2007-08-27 | 铅浓度测定用试剂和铅浓度测定方法 |
EP07790398A EP2058656A4 (en) | 2006-08-28 | 2007-08-27 | REAGENT FOR BLEIKONZENTRATIONBESTIMMUNG AND METHOD FOR BLEIKONZENTRATIONSBESTIMMUNG |
US12/377,476 US20090263907A1 (en) | 2006-08-28 | 2007-08-27 | Reagent for lead concentration determination and method of determining lead concentration |
JP2008531955A JP4964887B2 (ja) | 2006-08-28 | 2007-08-27 | 鉛濃度測定用試薬及び鉛濃度測定方法 |
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US (1) | US20090263907A1 (ja) |
EP (1) | EP2058656A4 (ja) |
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CN101755205B (zh) | 2007-07-20 | 2012-01-11 | 兴和株式会社 | 铅浓度测定用试剂以及铅浓度测定方法 |
CN102141487B (zh) * | 2010-12-16 | 2012-10-17 | 北京大学 | 基体中痕量铅的分离富集方法 |
TWI477760B (zh) | 2011-12-29 | 2015-03-21 | Univ Nat Central | 一種量測水中成分及其濃度之變動光徑量測裝置及其量測方法 |
CN103940953A (zh) * | 2013-08-06 | 2014-07-23 | 江苏天瑞仪器股份有限公司 | 用于检测水质中铅离子的试剂包的制备方法 |
CN103472230B (zh) * | 2013-09-28 | 2015-12-02 | 河南科技学院 | 检测铅离子的间接竞争酶联免疫试剂盒及其制备方法 |
CN103728264A (zh) * | 2013-12-23 | 2014-04-16 | 聚光科技(杭州)股份有限公司 | 一种铅检测方法 |
CN104020165B (zh) * | 2014-06-16 | 2017-02-15 | 河南省科学院生物研究所有限责任公司 | 一种测量尿液中含铅量的试剂及其快速检测方法 |
JP5962722B2 (ja) * | 2014-08-29 | 2016-08-03 | 栗田工業株式会社 | キレート剤添加量決定装置及びキレート剤添加量決定方法 |
CN106588961A (zh) * | 2017-01-13 | 2017-04-26 | 山东大学 | 一种双核邻菲罗啉锌配合物及其合成方法与应用 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0961416A (ja) | 1995-08-22 | 1997-03-07 | Sumitomo Metal Mining Co Ltd | 鉛の定量方法 |
US6437067B1 (en) | 2001-11-30 | 2002-08-20 | Kowa Co., Ltd. | Porphyrin-nucleus introduced polymers |
JP2006023132A (ja) * | 2004-07-06 | 2006-01-26 | National Institute Of Advanced Industrial & Technology | ろ過膜及びそれを用いた鉛イオンの簡易定量方法 |
WO2006011549A1 (ja) | 2004-07-29 | 2006-02-02 | Kowa Co., Ltd. | 鉛測定用試薬 |
JP2006242691A (ja) * | 2005-03-02 | 2006-09-14 | Kowa Co | 鉛濃度の測定法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4818702A (en) * | 1986-06-02 | 1989-04-04 | Litmus Concepts, Inc. | Fecal occult blood test reagent |
JPH0673474B2 (ja) * | 1987-03-25 | 1994-09-21 | 東洋紡績株式会社 | ス−パ−オキサイドアニオンの定量法 |
AUPQ776800A0 (en) * | 2000-05-26 | 2000-06-22 | Seba Diagnostics Pty. Ltd. | Detection method and reagents |
US6663880B1 (en) * | 2001-11-30 | 2003-12-16 | Advanced Cardiovascular Systems, Inc. | Permeabilizing reagents to increase drug delivery and a method of local delivery |
US6515089B1 (en) * | 2001-11-30 | 2003-02-04 | Kowa Co., Ltd. | Trace metal measuring method |
CN1159317C (zh) * | 2002-07-02 | 2004-07-28 | 华东师范大学 | 一种新含氟卟啉类显色剂meso-四(2,5-二氟苯基)卟啉及其合成和应用 |
US20040047835A1 (en) * | 2002-09-06 | 2004-03-11 | Cell Therapeutics, Inc. | Combinatorial drug therapy using polymer drug conjugates |
WO2007002580A2 (en) * | 2005-06-23 | 2007-01-04 | Bioveris Corporation | Diagnostic as say system with multi -well reagent container |
-
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- 2007-08-27 WO PCT/JP2007/000914 patent/WO2008026313A1/ja active Application Filing
- 2007-08-27 JP JP2008531955A patent/JP4964887B2/ja not_active Expired - Fee Related
- 2007-08-27 CN CN2007800317823A patent/CN101506651B/zh not_active Expired - Fee Related
- 2007-08-27 EP EP07790398A patent/EP2058656A4/en not_active Withdrawn
- 2007-08-27 US US12/377,476 patent/US20090263907A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0961416A (ja) | 1995-08-22 | 1997-03-07 | Sumitomo Metal Mining Co Ltd | 鉛の定量方法 |
US6437067B1 (en) | 2001-11-30 | 2002-08-20 | Kowa Co., Ltd. | Porphyrin-nucleus introduced polymers |
JP2006023132A (ja) * | 2004-07-06 | 2006-01-26 | National Institute Of Advanced Industrial & Technology | ろ過膜及びそれを用いた鉛イオンの簡易定量方法 |
WO2006011549A1 (ja) | 2004-07-29 | 2006-02-02 | Kowa Co., Ltd. | 鉛測定用試薬 |
JP2006242691A (ja) * | 2005-03-02 | 2006-09-14 | Kowa Co | 鉛濃度の測定法 |
Non-Patent Citations (3)
Title |
---|
"General Catalogue", January 2000, DOJINDO LABORATORIES, pages: 268 - 271 |
JONATHAN S. LINDSEY ET AL.: "Rothemund and Adler-Longo reactions revisited: synthesis of tetraphenylporphyrins under equilibrium conditions", J. ORG. CHEM., vol. 52, 1987, pages 827, XP002125259, DOI: doi:10.1021/jo00381a022 |
See also references of EP2058656A4 * |
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CN101506651A (zh) | 2009-08-12 |
US20090263907A1 (en) | 2009-10-22 |
EP2058656A1 (en) | 2009-05-13 |
EP2058656A4 (en) | 2011-05-18 |
CN101506651B (zh) | 2011-05-18 |
JP4964887B2 (ja) | 2012-07-04 |
JPWO2008026313A1 (ja) | 2010-01-14 |
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