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Particle Size Distribution (Rotap) Test

Price

$100 per analysis

Turnaround time

7 - 9 Business Days

Rush

Available

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You can expect high-quality, reliable results time after time.

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Particle Size Distribution (Rotap) Test

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Technical data sheet

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

*Prices and offerings are subject to change without notice.

Common Particle Size Distribution (Rotap) Test Testing Questions

What are the methods and detection limits for the assays I request?

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.

What is your turnaround time?

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.