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Derivative spectrophotometric detection method of sodium saccharin in a nickel-based solution

A technology of sodium saccharin and solution, which is applied in the field of derivative spectrophotometric detection of sodium saccharin in nickel-based solution, achieving the effects of good reproducibility, high accuracy and simple instruments

Active Publication Date: 2020-01-10
金川镍钴研究设计院有限责任公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no accurate and rapid method for detecting sodium saccharin in nickel-based solution in China

Method used

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  • Derivative spectrophotometric detection method of sodium saccharin in a nickel-based solution
  • Derivative spectrophotometric detection method of sodium saccharin in a nickel-based solution
  • Derivative spectrophotometric detection method of sodium saccharin in a nickel-based solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Pipette 10mL of nickel matrix solution (Ni concentration is basically the same as Ni in anode and anode solution) to five 100mL volumetric flasks, then add 1mg / L saccharin sodium standard solution 0mL, 1mL, 2mL, 4mL, 6mL to determine Content, and in the 220-250nm wavelength range for ultraviolet spectrum scanning, obtained as figure 2 The spectrum shown.

[0022] Will figure 2 After the first-order derivation of the 5 spectra and magnification of 100 times, the following image 3 The spectrum shown. By looking up the values ​​at 234.2nm, 236.7nm, and 243.0nm, the values ​​in Table 1 can be obtained. After the data in Table 1 are processed by establishing a rectangular coordinate system as described above, the measured values ​​of standard wavelengths of nickel matrix solutions with different sodium saccharin contents can be obtained as shown in Table 2.

[0023] Table 1 Absorbance at wavelengths of 234.2nm, 236.7nm, and 243.0nm (magnification by 100 times)

[002...

Embodiment 2

[0033] Pipette 10mL of the nickel matrix solution (the Ni concentration is basically the same as that in the anode and cathode solutions) into five 100mL volumetric flasks, and process them according to the method in Example 1 to obtain a measured value of 0.1034 at the standard wavelength of the sample to be tested. , into the working curve x=0.0607c+0.0065 to obtain the concentration of sodium saccharin: 1.60mg / L.

Embodiment 3

[0035] Pipette 10mL of the nickel matrix solution (the Ni concentration is basically the same as that in the anode and cathode solutions) into five 100mL volumetric flasks, and process them according to the method in Example 1 to obtain a measured value of 0.1601 at the standard wavelength of the sample to be tested. , into the working curve x=0.0607c+0.0065 to obtain the concentration of sodium saccharin: 2.53mg / L.

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Abstract

The invention discloses a derivative spectrophotometric detection method for sodium saccharin in a nickel-based solution, and belongs to the technical field of hydrometallurgy. The method scans a nearultraviolet region by an ultraviolet-visible spectrophotometer to excite the transition of valence electrons in a molecule to obtain an ultraviolet absorption spectrum, and then uses a mathematical method to process the spectrum to detect the content of the sodium saccharin in the nickel-based solution. The derivative spectrophotometric detection method can accurately analyze the content of the sodium saccharin in the nickel-based solution, and has the characteristics of high stability and good reproducibility. The method has the advantages of simple instrument, convenient operation and highaccuracy, can effectively eliminate the background interference, in particular, avoids the cumbersome pretreating steps of a sample, and can achieve the purpose of measurement without separation.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a derivative spectrophotometric detection method of saccharin sodium in a nickel-based solution. Background technique [0002] Sodium saccharin is a commonly used brightener in electroplating and electrolysis industries. It is often added to the electrolysis (plating) solution to increase the metallic luster of the electrolysis product (plating piece). At present, nickel-based solution is used as the base solution in the electrolytic (plating) nickel process, and other additives are added to improve its electrochemical properties. A certain concentration of sodium saccharin directly affects the metallic luster of the electrolytic product (plating piece). At present, there is no accurate and rapid method for the detection of sodium saccharin in nickel-based solutions in China. [0003] Derivative spectrophotometry is an analysis method that can distinguish spectral lines ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 赵德王军魏焘严雪木王翠亚
Owner 金川镍钴研究设计院有限责任公司
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