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17th CSITC Round Trial completed
02
Apr '11
The 17th Round Trial under the auspices of the Task Force on Commercial Standardization of Instrument Testing of Cotton (CSITC RT 2011-1) was conducted from January to March 2011. Seventy-six testing facilities participated in the Round Trial and submitted results for evaluation from 115 instruments.

The typical inter-laboratory variations achieved by instrument testing, given as standard deviations, were:

Inter-laboratory variation for the color parameters of Rd and +b increased in 2010. However, the variations in this round trial were smaller, indicating that laboratory operators are able to utilize the detailed diagnostic information provided after each Round Trial in order to improve performance.

Laboratories are given an overall ranking, as well as rankings for performance on each of the six parameters. Results for each test center are confidential. Rankings are based on the results of each lab in coming closest to the mean (average) values for all laboratories participating in the Round Trial on all six parameters.

The range of scores for the combined properties among the 115 instruments was 0.22 to 1.66 (a score of zero would be perfect), and the median overall evaluation of combined properties was 0.50.

Besides the 6 parameters for ranking, 4 additional parameters were evaluated for informational purposes: Short Fiber Index (SFI), Maturity, Trash Area and Trash Count. The inter-laboratory variations for the four experimental parameters are higher than for the 6 CSITC approved parameters. Therefore, laboratories are not evaluated on their ability to test for the new parameters.

The ICAC Task Force on CSITC is conducting global CSITC Round Trials consisting of quarterly tests. All cotton fiber testing laboratories capable of measuring cotton samples with rapid testing instruments, often referred to as high volume instruments (HVI), and based on the Universal Calibration Cotton Standards for Micronaire, Upper-half mean length, Length uniformity index, Strength, Rd color, and +b color are encouraged to participate.

The International Cotton Advisory Committee - ICAC is an association of governments of cotton producing, consuming and trading countries.

International Cotton Advisory Committee - ICAC

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