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ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) measurement of content of impurity phosphorus in steel

An ICP-AES, impurity technology, applied in the field of impurity element phosphorus, can solve the problems of low repeatability, inconvenient solution preparation, inaccurate measurement results, etc.

Active Publication Date: 2013-09-11
JIANGSU DELONG NICKEL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently used measurement methods such as spectrophotometry are complicated to measure, inconvenient to prepare solutions, inaccurate measurement results, and low repeatability, which have limited production needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of ICP-AES measurement method of impurity phosphorus in iron and steel, its step comprises:

[0017] (1) Weigh 1.0 grams of the sample into a 100mL polytetrafluoroethylene beaker, wet it with a small amount of water, add 5mL of hydrofluoric acid, drop 10mL of nitric acid (1:1), heat to dissolve, add 5mL of perchloric acid to smoke To nearly dry, after cooling to room temperature, add 5mL nitric acid (1:1) and a small amount of water to heat to dissolve, after cooling again, transfer to a 100ml volumetric flask; then add n-butanol-chloroform 20mL, ammonium molybdate solution into the funnel 10mL, cover and vibrate for 60 seconds, after standing for stratification, heat to 135 degrees Celsius, then cool to room temperature, stand for stratification and discard the organic phase; add 30mL of ethyl acetate, shake for 45 seconds, then add 30mL of chloroform , shake for 45 seconds, discard the organic phase after stratification; continue to stand until stratification, ...

Embodiment 2

[0028] A kind of ICP-AES measurement method of impurity phosphorus in iron and steel, its step comprises:

[0029] Weigh 1.0g of the sample into a 100mL polytetrafluoroethylene beaker, moisten it with a small amount of water, add 5mL of hydrofluoric acid, drop 10mL of nitric acid (1:1), heat to dissolve, add 5mL of perchloric acid to smoke until it is almost dry , after cooling to room temperature, add 5mL nitric acid (1:1) and a small amount of water and heat to dissolve, after cooling again, transfer to a 100ml volumetric flask; then add 20mL n-butanol-chloroform, 10mL ammonium molybdate solution, Cover and vibrate for 60 seconds. After standing still and stratifying, heat to 145 degrees Celsius, then cool to room temperature, and let stand until stratification discards the organic phase; add 30 mL of ethyl acetate, shake for 45 seconds, add 30 mL of chloroform, shake for 45 Seconds, discard the organic phase after stratification and dilute to 100mL with ultrapure water for ...

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PUM

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Abstract

The invention discloses a method for measuring the content of the impurity phosphorus in steel. According to the method, the content of the impurity phosphorus in steel is measured by adopting an ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) method. The method comprises the following steps of: firstly dissolving a phosphorus sample, adding certain amounts of potassium permanganate and salpeter solutions, adding solutions of n-butyl alcohol-chloroform and the like, heating, and dispelling, thereby dissolving phosphorus effectively; then measuring the content of phosphorus by adopting an ICP-AES spectrograph. The base body interference is tiny by adopting the method for detection, and the requirement of production can be met.

Description

technical field [0001] The invention relates to the measurement of elements, in particular to the measurement of impurity element phosphorus in iron and steel by using ICP-AES plasma coupled atomic emission spectrometry. Background technique [0002] Phosphorus generally exists in the state of apatite (3CaO·P2O5) in ores, and also exists in the state of cyanite (3FeO·As3O5). Phosphorus is fully reduced in the blast furnace and mostly goes into pig iron. Iron and steel containing a lot of phosphorus is easy to crack when processed at low temperature, which is the so-called "cold brittle". Therefore, it is particularly important to find a fast and effective method for measuring arsenic content in steel. However, currently used measurement methods such as spectrophotometry are complicated to measure, inconvenient to prepare solutions, inaccurate in measurement results, and low in repeatability, which have limited production needs. Inductively coupled plasma atomic emission s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
Inventor 傅酉付玉生
Owner JIANGSU DELONG NICKEL IND CO LTD