Sample treatment method for determining copper in copper concentrate

Abstract

The invention belongs to the technical field of methods for determining copper in copper concentrate, and particularly relates to a sample treatment method for determining copper in copper concentrate. The method comprises the following steps: (1) respectively weighing 11 parts of national primary standard substances GBW07166 and 11 parts of ZBK338 0.4000g parallel samples, and putting the samplesinto a 300mL conical flask; (2) wetting the samples with a small amount of water, adding 10 mL of hydrochloric acid, and placing the samples on an electric heating plate for low-temperature heating for 3-5 min; (3) adding 5mL of nitric acid, and performing low-temperature heating for 3-5min; (4) adding 5mL of sulfuric acid (1 + 1), performing low-temperature heating for 3-5min, then adding 3mL ofperchloric acid, performing heating for dissolving until no black residue exists, performing evaporation to dryness, and performing cooling. Long-term practice proves that the method is accurate andstable in measured value, good in human body safety and worthy of popularization.

Description

technical field [0001] The invention belongs to the technical field of copper determination methods in copper concentrates, and in particular relates to a sample processing method for determination of copper in copper concentrates. Background technique [0002] In the national standard GB / T 3884.1-2012, the short-iodometric method for the determination of copper content in copper concentrates is a classic and practical method, and has been widely used in laboratory testing. However, this method needs to add 0.5-1mL bromine when dissolving the sample. Bromine has a pungent odor, which can stimulate the mucous membranes of the human body, and easily cause tears and coughs; bromine has a corrosive ability to the human body, and the contact between the skin and liquid bromine can cause Serious injury, detrimental to the physical health of the inspector. [0003] The information disclosed in this Background section is only for enhancing the understanding of the general backgroun...

AI Technical Summary

Problems solved by technology

However, this method needs to add 0.5-1mL bromine when dissolving the sample. Bromine has a pungent odor, which can stimulate the mucous membranes of the human body, and easily cause tears and coughs; bromine has a corrosive ability to the human body, and the contact between the skin and liquid bromine can cause Serious injury, detrimental to the physical health of the inspector

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