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Method for measuring phosphor content in cold rolled degreasing agent

A measurement method and degreasing agent technology, applied in the field of cold rolling aids, can solve problems such as degreasing agent interference, achieve good accuracy, strong anti-interference ability, and ensure the effect of rolling quality

Inactive Publication Date: 2012-04-11
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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AI Technical Summary

Problems solved by technology

Using the traditional method for the determination of phosphate in aqueous solution, the high alkalinity of the degreasing agent and various components of the matrix have greatly interfered with the method, so it is not suitable for the determination of phosphorus content in the degreasing agent

Method used

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  • Method for measuring phosphor content in cold rolled degreasing agent

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Embodiment Construction

[0019] A method for measuring phosphorus content in a cold-rolled degreasing agent of the present invention comprises:

[0020] Weigh 2.0000g of the sample degreasing agent in a polytetrafluoroethylene beaker, add a small amount of pure water, and add dilute nitric acid to adjust to pH=4-9;

[0021] Then add 2-5 ml of the dilute nitric acid, and digest on the electric furnace;

[0022] After boiling, slowly add 2-8 ml of hydrogen peroxide and keep it at a slight boil for 10 minutes;

[0023] Transfer the digestion solution to the test solution in a volumetric flask, control 0.5-2% nitric acid medium, dilute it with water to the mark, and shake well to obtain the sample to be tested;

[0024] The sample to be tested is injected into the ICP quartz tube, and the light radiation intensity generated by the ground state atoms of phosphorus at the detection wavelength of 213.618 nm is measured by plasma spectroscopy, thereby quantifying the content of phosphorus in the degreaser sa...

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Abstract

The invention relates to a cold rolled auxiliary agent, concretely relates to a method for detecting the quality of a cold rolled degreasing agent. The method for measuring phosphor content in the cold rolled degreasing agent comprises the following steps: weighting 2.0000g sample degreasing agent in a teflon beaker, adding a few pure water, adding dilute nitric acid for regulating the pH value of 4-9; adding 2-5 milliliters nitric acid with volume ratio of 1:1, degrading on an electric furnace; slowly adding 2-8 milliliters hydrogen peroxide after boiling, keeping the slight boiling state for 10 minutes; transferring a digestion solution in a volumetric flask, controlling 0.5-2% of nitric acid medium, diluting by using water to scale, uniformly sharking to obtain the sample to be measured; injecting the sample in a ICP quartz tube, determining optical radiation intensity generated under the 213.618nm detection wavelength of ground state atom of phosphor by a plasma spectra method, thereby the phosphor content in the degreasing agent sample can be quantified. The determination method of the phosphor content has strong anti-interference capability, and is especially suitable for detecting complex matrix of degreasing agent and the like.

Description

technical field [0001] The invention relates to a cold rolling aid, in particular to a method for detecting the quality of a cold rolling degreasing agent. Background technique [0002] Cold-rolled degreasing agent is a process medium for degreasing cold-rolled metal sheets before galvanizing and color coating. The degreasing agent itself is mainly composed of sodium hydroxide and is compounded with a variety of chemical raw materials. The removal efficiency of dirt such as processing lubricating oil and anti-rust oil and even the surface quality of the steel plate have a direct impact. Among them, the content of various forms of phosphorus directly affects the degreasing effect. In the past two years, the influence of phosphorus content on the degreasing effect has begun to attract people's attention. At present, the cold rolling process is generally controlled below 50μg / g, so the phosphorus content must be accurate. Determination. [0003] However, neither degreaser nor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N27/626
Inventor 蒋文捷杨四川梁悦绮
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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