Method for detecting ammonium sulfate and glycine content in sulfate black liquid

Abstract

The invention provides a method for detecting ammonium sulfate and glycine content in sulfate black liquid. According to the invention, a formaldehyde titration method is employed for detecting total content of ammonium sulfate and a sodium hydroxide standard solution consumed by glycine, an auxiliary spectrum method for a principle of charge conservation is employed for detecting the ammonium sulfate content in a sample and the content of the sodium hydroxide standard solution consumed by ammonium sulfate, and finally the content of glycine can be calculated by a subtractive method. The method can accurately detect two substances of ammonium sulfate and glycine in the sulfate black liquid with one-time detection, the detection method can detect the other necessary test items in the black liquid, the detection time of the black liquid is saved, the detection efficiency is obviously increased, the detection result can be calculated by employing data processing software, the intermediate calculating processes are greatly reduced, the processes are simple, detection time is short, result is accurate and stable, and the high frequency medicine detection requirements in high-precision calendering copper foil anaphase surface treatment can be completely satisfied.

Description

Technical field [0001] The invention relates to the technical field of surface treatment of high-precision rolled copper foil, in particular to a method for detecting the content of ammonium sulfate and glycine in a sulfate blackening solution. Background technique [0002] Rolled copper foil is the process of smelting copper into ingots, then hot-rolling billets, roughing and finishing rolling into copper foil base material of 0.1mm ~ 0.15mm, and finally repeated rolling by copper foil rolling mill. The thickness is usually 6 μm to 70 μm. Therefore, the crystalline structure of rolled copper foil is a sheet structure, which is superior to electrolytic copper foil in terms of strength and toughness. In addition, the calendered copper foil has a higher density and a smoother surface, which is more conducive to the rapid transmission of signals behind the circuit board. It has a wide range of applications on high-frequency, high-speed transmission and fine circuit printed circuit ...

AI Technical Summary

Problems solved by technology

[0006] At present, the detection of glycine can use the formaldehyde method, which is the same as the detection procedure of ammonium sulfate, because both react with formaldehyde and interfere with each other; the other is the non-aqueous perchloric acid titration method, which is the detection method in the national standard, but this method is applicable For glycine solids, glycine solution detection is not applicable; there is no good solution for the above defects

[0007] At present, in the high-precision rolled copper foil processing industry, the properties of ammonium sulfate and glycine in the sulfate blackening solution have something in common, both of which can react with alkali and formaldehyde. At present, there is no good shielding agent for the detection of the two. In addition, sulfate also affects the detection, resulting in inaccurate detection results, complicated steps, long detection time, insensitive detection end point and other defects in the existing detection methods. The detection efficiency and accuracy cannot meet the post-surface treatment of high-precision rolled copper foil. Requirements for medium and high frequency drug testing

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