Cotton The Impurity Standard Sample Preparation Program Research

Cotton cotton impurity inspection is the important work in the inspection, the impurity rate of cotton cotton trade settlement index, in the acquisition, processing, sales, storage and acceptance in the link such as are required for testing for impurities. Cotton impurity test data is accurate or not, directly related to the vital interests of the parties to the transaction. Due to the lack of a unified test datum, plus various cotton inspection units use cotton impurity analysis machine is endless and same, operator proficiency and technical level is uneven, causes the test results is difficult to agree with each other, some even great disparity. To make the throughout the country's cotton impurity analysis machine testing results are better consistent and comparable, so that the test data in the same standard level, need for a cotton calibration substance namely" cotton impurity calibration samples" as national cotton impurity analysis machine calibration reference, the quantity value transfer consistency of standards is very necessary.Based on the national standard GB/T15000.3" directives for the work of reference materials and standard sample definite value general principles and statistic methods," GB/ T8170" numerical rounding rules and limit values of expression and judgement," GB/ T4882" statistical interpretation of data normality test" and other standards and methods of research and Application of standard sample development, exploration of impurities of national standard method and approach of feasibility. In this paper, literature data and a large number of test data on the basis of the standard sample preparation, meet the requirements for calibration, cotton impurity analysis machine provided a basis, make pily conditioned weight inspection to be technical assurance, with metrology traceability, can meet the expected requirements.