Examination and approval of the odor standard samp

  • Detail

"Fiber and fiber products odor standard samples" standard approval

many people have the habit of smelling when purchasing clothing and bedding. Many national standards for textiles and wadding fiber products also put forward requirements for odor inspection items, but there is no specific detection method standard to detect odor items. The recently approved national standard "determination of peculiar smell of wadding fiber products" will fill the gap in this field

it is understood that China's mandatory national standards, such as the national basic safety technical code for textile products, the general technical requirements for wadding fiber products, and the technical requirements for ecological textiles, require the detection of odors, including musty flavor, high boiling range petroleum flavor (gasoline flavor, kerosene flavor, diesel flavor, etc.), Fishy Flavor, aromatic hydrocarbon flavor, unwashed animal fiber smell, smelly smell, etc. Odor, an important technical index reflecting the quality of fibers and fiber products, is tested by artificial sensory inspection. In this kind of subjective inspection, the correct understanding, familiarity, mastery of inspection methods and individual factors of inspectors will have a great impact on the inspection results. Although the standard requires the inspectors to be trained, because the odor inspection has not been carried out in China for a long time, the inspectors' practical experience is relatively insufficient, and there are some problems in odor inspection

what are the standard musty and fishy tastes? The "fiber and fiber products odor standard sample" issued in February 2009 is the national standard for the standard "odor" sample. The inspector smells the standard sample, and according to the relevant requirements, 6. Smell the tested sample after the pipeline pressure test, and then you can judge whether there is any peculiar smell. Of course, it is not necessary to smell the standard sample every time, but it is necessary to calibrate the smell with the standard sample as required

according to Feng Ping, director of the technical management department of the China Fiber Inspection Bureau, under normal circumstances, textile fibers will have some inherent smells of the fibers themselves. During the production and processing of wadding fiber products, chemical residues will be produced. These residues will gradually volatilize or oxidize and decompose during the use of textile products, which will produce special odor; After the flocculent fiber products are polluted by microorganisms, the reproduction of microorganisms and the decomposition of fibers and residual organic matter by microorganisms will also produce odor. Some odors will have an adverse impact on human health if they reach a certain level, so inspection requirements for odors are put forward in domestic and foreign textile product standards. With the more and more extensive use of the "standard sample of fiber and fiber products odor", the China Fiber Inspection Bureau has completed the national standard of "determination of fiber products odor for flocculation" in conjunction with other laboratories, filling the gap in the detection field

according to the introduction, this standard was jointly completed by the national fiber quality supervision and inspection center, Guangzhou fiber product inspection institute and Chongqing fiber fabric inspection institute. The investigation shows that the problem of odor inspection is that the same sample is tested in the same laboratory, and the test results of different personnel are different; When the same sample is tested in different laboratories, different results will also appear. The first reason is that some inspectors do not know the odor well and cannot distinguish it clearly; Second, different personnel have different sensitivities to odor, and their grasp of the intensity of odor varies; Third, there is no detailed description of the inspection method of the odor, and there is no strict restriction on the environmental conditions of the detection. The odor is produced by the volatilization of some substances in the fiber and its products into the air. Click the release button. At different temperatures, the degree of volatilization of substances is different, and the severity of the odor is also different

according to the introduction of Xin zhoushuo, the main drafter of the standard and the reagent made by the national fiber quality supervision and inspection, the requirements of the standard on laboratory equipment and materials, testing environment, sample preparation, testing procedures and other aspects are important prerequisites for the accuracy of sensory testing. In particular, detailed requirements are made for the inspectors to strengthen the utilization and promotion of new materials and products, including good health, normal smell, no smoking and no alcohol abuse; Do not use odorous cosmetics or skin care products on the day of testing. Wash your hands and rinse your mouth with clear water before testing to remove oral odor. It is also stipulated that 2 ~ 3 deep breaths are required to enter the detection environment, and then wait for 10 seconds to adapt to the detection environment. It also puts forward requirements for the olfactory calibration of testers, and stipulates that the testers who have been engaged in the detection of this project for a long time should carry out olfactory calibration once a month, and the olfactory calibration time should be shortened to one week when the testers have changes, diseases or have not been engaged in the detection of this project for a long time

this standard, combined with the "fiber and fiber products odor standard sample", can improve the inspectors' identification of the odor types specified in floc fiber products including textiles, uniformly grasp the intensity of odor, and improve the accuracy of odor inspection

note: the reprinted content is indicated with the source. The reprint is for the purpose of transmitting more information, and does not mean to agree with its views or confirm the authenticity of its content

Copyright © 2011 JIN SHI