Method for analyzing and detecting trace metal ion impurities in dimethyl diallyl ammonium chloride monomers
A technology of dimethyl diallyl ammonium chloride and trace metals, which is applied in the preparation of test samples, measurement of color/spectral properties, etc., can solve the problems of difficulty in ensuring the accuracy and limitation of metal ion content determination results, and the like, Achieve the effect of avoiding operational difficulties and result errors, improving accuracy, and high analytical precision
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[0034] Example 1
[0035] (1) Preparation of mixed standard working solution
[0036] Accurately pipette a certain volume of Fe, Cu, Ni single element standard solution (500mg / L), and add it to the high-purity DMDAAC monomer solution with a mass fraction of 30% in turn to prepare mass concentrations of 0.05, 0.10, 0.30, 0.50, 0.70, 0.90, 1.00mg / L series of metal ion-containing monomer standard working solutions.
[0037] (2) complexation reaction
[0038] Take 20mL standard working solutions of metal ion monomers with different mass concentrations in a 50mL separatory funnel, adjust its pH value to 1 with nitric acid solution, add 2.0mL complexing agent (the ratio of the amount of substances is 1:1: 1 mixed solution of ammonium pyrrolidine dithiocarbamate, sodium diethyl dithiocarbamate and 1,10-phenanthroline), shake and mix to make it fully complexed.
[0039] (3) Extraction and separation
[0040] Use a pipette to accurately pipette 5 mL of methyl isobutyl ketone into t...
Example Embodiment
[0059] Example 2
[0060] (1) Preparation of mixed standard working solution
[0061] Accurately pipette a certain volume of Fe, Cu, Ni single element standard solution (500mg / L), and add it to the high-purity DMDAAC monomer solution with a mass fraction of 45% in turn to prepare mass concentrations of 0.05, 0.10, 0.20, 0.40, 0.60, 0.80, 1.00mg / L series of metal ion-containing monomer standard working solutions.
[0062] (2) complexation reaction
[0063] Take 20mL of different mass concentrations of metal ion-containing monomer standard working solution in a 50mL separatory funnel, adjust its pH value to 3 with nitric acid solution, add 2.5mL complexing agent (the ratio of the amount of substances is 1:1: 1 mixed solution of ammonium pyrrolidine dithiocarbamate, sodium diethyl dithiocarbamate and 1,10-phenanthroline), shake and mix to make it fully complexed.
[0064] (3) Extraction and separation
[0065] Use a pipette to accurately pipette 8 mL of methyl isobutyl ketone...
Example Embodiment
[0082] Example 3
[0083] (1) Preparation of mixed standard working solution
[0084] Accurately pipette a certain volume of Fe, Cu, Ni single element standard solution (500mg / L), and add it to the high-purity DMDAAC monomer solution with a mass fraction of 60% in turn to prepare mass concentrations of 0.05, 0.10, 0.20, 0.40, 0.80, 1.00mg / L series of metal ion-containing monomer standard working solutions.
[0085] (2) complexation reaction
[0086] Take 20mL standard working solutions of metal ion-containing monomers with different mass concentrations respectively in a 50mL separatory funnel, adjust its pH value with nitric acid solution to be 6, add 3.0mL complexing agent (the ratio of the amount of substances is 1:1: 1 mixed solution of ammonium pyrrolidine dithiocarbamate, sodium diethyl dithiocarbamate and 1,10-phenanthroline), shake and mix to make it fully complexed.
[0087] (3) Extraction and separation
[0088] Use a pipette to accurately pipette 10 mL of methyl ...
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