Ultrasonic rapid quantitative method for wool blending product

Abstract

The invention discloses an ultrasonic rapid quantitative method for a wool blending product. The method includes the following steps: selecting a reference sample according to non-target dissolved fibers of a to-be-detected wool blending product; taking and drying a sample of the to-be-detected wool blending product and the reference sample to a constant weight in a ventilated drying oven, and then weighing and recording; respectively placing the sample and the reference sample with the constant weight samples into two bottles, and adding a sodium hypochlorite solution of 0.5 M; placing the two bottles into a thermostatic numerical control ultrasonic generator, treating at 40 DEG C for 23 minutes, then rinsing residues of the sample and the reference sample under running water with a colander immediately, then drying the residues of the sample and the reference sample to the constant weight in the ventilated drying oven, and then weighing and recording; and finally calculating the netdry mass fraction of dissolved components of the sample by a formula. The method solves a temperature control problem in a traditional testing process by adopting a constant temperature ultrasonic technology, accelerates the mass transfer rate between phases through the cavitation effect of ultrasonic waves under constant temperature conditions, and improves the quantitative detection efficiency of the wool blending product.

Description

technical field [0001] The invention relates to an ultrasonic rapid quantitative method for wool blended products, belonging to the field of quantitative chemical analysis of textiles. Background technique [0002] In quantitative chemical analysis of textiles, use GB / T 2910.4-2009 Quantitative chemical analysis of textiles Part 4: Mixtures of certain protein fibers and certain other fibers (hypochlorite method), quantitative by hypochlorite method is the current textile The most commonly used detection method in the quantitative detection of wool. When the laboratory uses this standard, the sample is treated at 20°C ± 2°C for 40 minutes according to the solvent (1mol / L sodium hypochlorite) and sample ratio of 100:1; The amount of use is large, which is not conducive to environmental protection; and the requirements for temperature control are high. In seasons with high ambient temperature, it is difficult to guarantee the water bath requirement of 20°C in actual operation; ...

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Problems solved by technology

[0002] In quantitative chemical analysis of textiles, use GB / T 2910.4-2009 Quantitative chemical analysis of textiles Part 4: Mixtures of certain protein fibers and certain other fibers (hypochlorite method), quantitative by hypochlorite method is the current textile The most commonly used detection method in the quantitative detection of wool. When the laboratory uses this standard, the sample is treated at 20°C ± 2°C for 40 minutes according to the solvent (1mol / L sodium hypochlorite) and sample ratio of 100:1; The amount of use is large, which is not conducive to environmental protection; and the requirements for temperature control are high. In seasons with high ambient temperature, it is difficult to guarantee the water bath requirement of 20°C in actual operation; at the same time, the test period of 40min is too long, and the detection efficiency Low; the main defects are as follows:

[0003] 1. The test temperature requirement is 20°C ± 2°C. Since the test requires a ventilated environment, ordinary water bath oscillators do not have a cooling function, so it is difficult to meet the test requirements through external temperature control, and there are difficulties in actual operation;

[0004] 2. The test period is 40 minutes, the test period is long and the detection efficiency is low;

[0005] 3. The d value used for different types of fibers (correction coefficient for non-target lysed fibers, reflecting the degree of damage to corrected non-target lysed fibers) is a fixed value, which cannot reflect various factors caused by uncontrollable factors such as personnel and reagents during the test. The actual damage of the fiber-like

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