Method for measuring concentrations and molecular weights of glue and gelatin

A technology of molecular weight distribution and concentration, applied in chemical instruments and methods, material separation, analysis of materials, etc., can solve the problems of glue decomposition, non-quantitative collection of glue, and difficulty in correctly evaluating the existence of glue.

Inactive Publication Date: 2002-08-28
MITSUI MINING & SMELTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, electrochemical methods such as those described in 8-304338 are susceptible to coexisting species
A disadvantage of the dye adsorption method taught by 6-337247 is that gums with a molecular weight below 20,000 cannot be collected quantitatively
In addition, none of the methods proposed so far can provide information on the molecular weight distribution of the glue
Moreover, many traditional test methods are carried out under the condition of the coexistence of electrolyte components in the electrolyte, or even if the sample is pretreated before the test to remove the electrolyte components in the electrolyte, such pretreatment is time-consuming, and likely co-occurring glue breakdown
Therefore, these methods are difficult to correctly evaluate the presence of glue under analytical conditions

Method used

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  • Method for measuring concentrations and molecular weights of glue and gelatin
  • Method for measuring concentrations and molecular weights of glue and gelatin
  • Method for measuring concentrations and molecular weights of glue and gelatin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Take a sample from the copper electrolyte used in copper electrolytic refining, and dilute it twice with pure water immediately after sampling. Samples (diluted) were stored in the refrigerator until analysis.

[0050] use figure 2 The instrumentation shown was analyzed where:

[0051] Mobile phase: 0.005M sulfuric acid / acetonitrile volume ratio of 95 / 5 solution.

[0052] Pretreatment column: polyetheretherketone PEEK column (inner diameter: 7.5mm, length: 250mm) filled with Sephadex G-15 filler (particle size: ≤66um; exclusion limit: 1500; product of Pharmacia Biosystems).

[0053] Separation column: SHODEX PROTEIN KW-802.5 column (exclusion limit: 50000; inner diameter: 8mm; length: 300mm; product of Showa Denko Co., Ltd.).

[0054] The two columns were thermostatted at 25°C. The mobile phase was delivered to the system at a constant flow rate of 0.6 mm / min. When the baseline was stable, 200 microliters of the sample was injected into the injector and flowed into...

Embodiment 2

[0057] The test of the molecular weight of the glue in the copper electrolyte is carried out under the following conditions. The resulting chromatograms are shown in Figure 5 . The calculation of molecular weight is based on Figure 6 The calibration curve shown was performed. by just at Cu 2+ The peak area of ​​the gum before ion elution gave a concentration of 0.9 mg / l of gum with a molecular weight above 790.

[0058] Test Conditions:

[0059] Pretreatment column: polyetheretherketone PEEK column (inner diameter: 7.5mm, length: 250mm) filled with Sephadex G-15 filler (particle size: ≤66um; exclusion limit: 1500; product of Pharmacia Biosystems).

[0060] Separation column: Asahipak GS-320HQ (exclusion limit: 40000; inner diameter: 7.6 mm; length: 300 mm; product of Showa Denko Co., Ltd.).

[0061] Temperature: 25°C.

[0062] Mobile phase: 0.005M sulfuric acid / acetonitrile volume ratio of 80 / 20 solution.

[0063] Mobile phase flow rate: 0.6ml / min.

[0064] Amount o...

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Abstract

A method for testing the concentration and molecular weight distribution of gum or gelatin contained in an electrolyte comprising high performance liquid chromatography in combination with column switching.

Description

field of invention [0001] The present invention relates to a method for testing the concentration and molecular weight distribution of (animal) glue or gelatin present in small amounts in solutions, especially in copper electrolytes. In particular, the present invention relates to a test method that makes it possible to test the concentration and molecular weight distribution of components with molecular weights as small as 2500 or less. Background technique [0002] Electrolytic solutions used in the electrorefining of blister copper or in the production of copper foil often contain small amounts of (animal) glue or gelatin (hereinafter sometimes collectively called glue) as an additive. The glue in the electrolyte is used to control the physical properties of electrodeposited copper such as copper foil, such as mechanical strength, surface crystal structure, roughness, and hardness. In order to produce stable quality products, it is very important to control the gel conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/283B01J20/285G01N30/02G01N30/08G01N30/26G01N30/46G01N30/88G01N33/44
CPCG01N30/88G01N30/461G01N30/468G01N33/44G01N2030/027G01N2030/085
Inventor 田口丈雄荐田康夫端洋志栗原美穗冈田贤造
Owner MITSUI MINING & SMELTING CO LTD
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