Novel method for detecting content of formaldehyde in plate

Abstract

The invention discloses a novel method for detecting content of formaldehyde in a plate. The novel method comprises the following steps: (1) extracting released substances in a detected sample piece through microwaves with water serving as an extracting solution for 4 to 8 min; (2) adding purified etidronic acid with the same volume as that of the detected sample piece into a container; (3) adding liquid formed in the step (1), and adding an equivalent amount of distilled water; (4) adding 25 microliters of formaldehyde developing agent, stewing for 15 to 20 min, and uniformly shaking once every 5 min; (5) comparing the color of the liquid in the step (4) with a standard chromatoplate by using a spectrophotometer. The method disclosed by the invention is simple, feasible, low in cost and pollution-free, is particularly suitable for self-detection of formaldehyde releasing property of a product by an enterprise, and is wide in application range; the method can be used for sampling inspection of plates and formaldehyde content detection of other products.

Description

technical field [0001] The invention relates to a method for detecting formaldehyde content, in particular to a method for detecting formaldehyde content of a novel plate, belonging to the field of environmental monitoring. Background technique [0002] At present, the method of measuring the formaldehyde release in the plate in the national standard of China mainly adopts the perforation extraction method, but the perforation method is costly, complicated to operate, and uses many types of drugs, especially toluene is poisonous, difficult to handle, easy to pollute, and difficult to be used as a manufacturer self-assessment means. There are also some equipment on the market that detect formaldehyde in the air with simple operation methods, but they can only make qualitative measurements of whether the formaldehyde content in the air exceeds the standard, and cannot measure the amount of formaldehyde released from wood-based panels, let alone quantitative measurements. Con...

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Problems solved by technology

[0002] At present, the method of measuring the formaldehyde release in the plate in the national standard of China mainly adopts the perforation extraction method, but the perforation method is costly, complicated to operate, and uses many types of drugs, especially toluene is poisonous, difficult to handle, easy to pollute, and difficult to be used as a manufacturer self-assessment

There are also some equipment on the market that detect formaldehyde in the air with simple operation methods, but they can only make qualitative measurements on whether the formaldehyde content in the air exceeds the standard, and cannot measure the amount of formaldehyde released from wood-based panels, let alone quantitative measurements.