Particle Size Distribution (Rotap) Test
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Price
$100 per analysis
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Turnaround time 7 – 9 Business Days
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Rush Available
Technical data sheet
Print- Method description
Up to six sieves can be stacked on the Rotap in descending size order. The sample is placed on the top sieve and is sifted down via the shaking and tapping action of the instrument. Sample weights retained on the sieves are recorded. A full range of sieves with openings from 1 inch to 0.037 mm are available.
- Acceptable matrices
Free-flowing powders and particulates
- Unacceptable matrices
Liquids, particle sizes that are greater than 25 mm
- Limit of quantitation
A full range of sieves with openings from 0.037 to 25mm is available.
- Equipment
Rotap
- Method reference
Internally Developed Method
- Reportable unit
% retained on each sieve
- Sample size requirements
100 g
- Information required by submitter
Please supply estimates
- Additional information
This method sizes particulate samples and powders by sieve separation. However, for sticky or high-fat samples, the Alpine tester is more accurate.
Rotap Sieve Sizes Sieve# Opening(") Opening(µm) 1-inch 1.000 3/4-inch 0.750 5/8-inch 0.625 1/2-inch 0.500 7/16-inch 0.438 3/8-inch 0.375 1/4-inch 0.250 #4 0.187 4750 #5 0.157 4000 #6 0.132 3350 #7 0.111 2800 #8 0.0937 2360 #10 0.0787 2000 #12 0.0661 1680 #14 0.0555 1410 #16 0.0469 1190 #18 0.0394 1000 #20 0.0331 840 #25 0.0280 710 #30 0.0232 590 #35 0.0197 500 #40 0.0165 420 #45 0.0138 350 #50 0.0117 297 #60 0.0098 250 #70 0.0083 210 #80 0.0070 177 #100 0.0059 149 #120 0.0049 120 #140 0.0041 105 #170 0.0035 88 #200 0.0029 74 #230 0.0024 62 #270 0.0021 53 #325 0.0017 44 #400 0.0014 37
Common Particle Size Distribution (Rotap) Test Testing Questions
We make every effort to keep our methods and detection limits up to date according to the latest standards and qualifications. If you have any questions regarding the limit of detection/quantification or method references, please contact our Customer Service team at 1-800-245-5615.
Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.
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