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  • Oil droplet size, concentration and the LISST-100X | Sequoia Scientific
    Ross in Ottawa Ontario and COOGER DFO in Nova Scotia are using the LISST 100X for their monitoring efforts in the Gulf Some scientific papers that have been published in the peer reviewed literature demonstrating the use of LISST 100X for this purpose includes Lewis A Trudel BK Belore RC Mullin JV 2010 Large scale dispersant leaching and effectiveness experiments with oils on calm water Marine Pollution Bulletin 60 244 254 doi 10 1016 j marpolbul 2009 09 019 Belore RC Trudel K Mullin JV Guarino A 2009 Large scale cold water dispersant effectiveness experiments with Alaskan crude oils and Corexit 9500 and 9527 dispersants Marine Pollution Bulletin 58 118 128 doi 10 1016 j marpolbul 2008 08 013 Li Z Lee K Kepkay P King T Yeung W Boufadel MC Venosa AD 2008 Wave Tank Studies on Chemical Dispersant Effectiveness Dispersed Oil Droplet Size Distribution In Davidson WF Lee K Cogswell A Eds Oil Spill Response A Global Perspective NATO Science for Peace and Security Series C Environmental Security Springer pp 143 157 doi 10 1007 978 1 4020 8565 9 Li ZK Kepkay P Lee K King T Boufadel MC Venosa AD 2007 Effects of chemical dispersants and mineral fines on crude oil dispersion in a wavetank under breaking waves Marine Pollution Bulletin 54 983 993 doi 10 1016 j marpolbul 2007 02 012 Sterling MC Bonner JS Ernest ANS Page CA Autenrieth RL 2004 Characterizing aquatic sediment oil aggregates using in situ instruments Marine Pollution Bulletin 48 533 542 doi 10 1016 j marpolbul 2003 10 005 Sterling MC Jr Bonner JS Ernest ANS Page CA Autenrieth RL 2004 Chemical dispersant effectiveness testing influence of droplet coalescence MarinePollution Bulletin 48 969 977 doi 10 1016 j marpolbul 2003 12 003 For more information about the LISST 100X

    Original URL path: http://www.sequoiasci.com/article/oil-droplet-size-concentration-and-the-lisst-100x/ (2016-02-13)
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  • Adjusting your LISST data when using a PRM | Sequoia Scientific
    factory zscat Also once you have performed a zscat with a PRM in place be sure that the PRM is not removed and re inserted in another position e g using the opposite stand off as this will change the way the laser light scatters from the glass surfaces If the PRM is re moved and re inserted you should always do a new zscat measurement 2 Once you have processed the data collected with the PRM in place it is necessary to manually adjust a the volume concentration and b the beam attenuation in the ASC file that is being produced by the LISST SOP version 4 65 The reason for this is that version 4 65 of the SOP does not take the existence of a PRM into account when the data are being processed What happens is that the volume conversion constant that has been computed for your instrument is computed assuming a 5 cm path length If the path length becomes smaller then the volume conversion constant is suddenly too large and the particle volume will become too small when the SOP is computing the volume from the data a The volume concentration in columns 1 32 must be multiplied with 2 5 or 10 for data obtained with 50 80 and 90 PRM s respectively because the optical path length has been reduced by a factor of 2 5 and 10 b The beam attenuation c column 42 in the ASC file must be recomputed from the optical transmission tau column 41 as follows PRM c 50 ln tau 1 0 025m 80 ln tau 1 0 01m 90 ln tau 1 0 005m An alternative option is to simply multiply the beam attenuation in column 42 with 2 5 and 10 for data obtained

    Original URL path: http://www.sequoiasci.com/article/adjusting-your-lisst-data-when-using-a-prm/ (2016-02-13)
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  • Articles | Sequoia Scientific
    Mean Particle Diameter from a LISST Volume Distribution How to Compute the Mean Particle Diameter from a LISST Volume Distribution Sequoia March 26 2010 In the table below the computation of the mean particle size from a LISST volume distribution is outlined Column A is the size class number from 1 32 Column B is the MID POINT Converting LISST volume concentration to mass concentrations How do I convert the volume concentrations VC from the LISST to mass concentrations Sequoia March 24 2010 Converting volume concentration VC to mass concentration total suspended solids or suspended sediment concentration requires some assumptions First of all the reason Bioblock Removal How to remove a BioBlock from a LISST 100X Sequoia March 24 2010 If a BioBlock is ordered together with a LISST 100X the BioBlock is shipped installed on to the LISST 100X However on occasion the user may wish to remove the BioBlock from the LISST 100X and use the instrument Getting an RMA number and returning a LISST instrument for service Are some LISST STX size classes more reliable than others for computing sediment excess density Are some LISST STX size classes more reliable than others for computing sediment excess density If so why Sequoia February 4 2010 The LISST STX and before that the LISST ST obtains the settling velocity by looking at the time history of the concentration variability in 8 I Cannot Connect to my LISST 100X I cannot connect to my LISST 100X Sequoia February 2 2010 Q I cannot connect to my LISST 100X The communication cable is connected to my computer as well as my LISST 100X and the LISST SOP is running but I am unable to talk to the instrument A Check the following First I Cannot Offload Data From my LISST 100X

    Original URL path: http://www.sequoiasci.com/library/articles/page/5/ (2016-02-13)
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  • Application Notes | Categories | Sequoia Scientific
    concentration limits for the LISST instruments However the results in that article does Read more Laser Diffraction 201 LISST April 15 2011 How LISST works Sequoia April 15 2011 1 The Ring Detector 2 How Particle Sizes and Measurement Angles are Selected 3 Origin of the Matrix Formulation It s just algebra 4 Inversion of Data the Information Content Read more Laser Diffraction 101 LISST April 14 2011 How LISST Works Sequoia April 14 2011 Laser Diffraction 101 Sequoia realizes that for some people the principle behind laser diffraction seems difficult to understand The purpose of this article and Laser Diffraction 201 Read more How is ppm related to concentration April 5 2011 ppm vs concentration in mg l or µl l Sequoia April 5 2011 How is ppm related to concentration ppm means parts per million But what parts The amount of particles in a suspension can be expressed as the total volume OR total Read more LISST Bin Sizes for inversions based on randomly shaped grains March 18 2011 Size Bins for use with Matrices based on Randomly Shaped Grains Sequoia March 18 2011 The tables below tabulate the values for the Type B and C size bins for inversions based on Sequoia s matrices for randomly shaped particles Read more Previous Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models

    Original URL path: http://www.sequoiasci.com/article_category/application-notes/page/4/ (2016-02-13)
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  • LISST-100X | Categories | Sequoia Scientific
    spill research community in the last Read more DeepWater Horizon Oil Spill in the Gulf of Mexico May 3 2010 DeepWater Horizon spill and the LISST 100X Sequoia May 3 2010 The LISST 100X instrument from Sequoia Scientific Inc has been used intensively by the oil spill research community in the last few years to measure the size and concentration Read more Adjusting your LISST data when using a PRM April 13 2010 A 50 PRM Adjusting your LISST data when you are using a PRM Sequoia April 13 2008 When using a LISST 100X or LISST STX with an Optical Path Reduction Module PRM in place it is necessary to be aware of two facts 1 It is very Read more Comparing volume concentration and mass concentration April 7 2010 How does µl l and mg l compare Sequoia April 7 2010 A question that Sequoia often gets asked is How does the volume concentration in units of µl l from the LISST compare to mass concentration in mg l And how do I convert Read more Small Volume Flow Throug Cell Installation Procedure March 31 2010 Small Volume Flow Through Cell Installation Procedure Sequoia March 31 2010 The Small Volume Flow Through Cell bolt on option for the LISST 100X allows for continuous size distribution measurements in a flow through operation Read more Previous Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST

    Original URL path: http://www.sequoiasci.com/article_category/lisst-100x/page/4/ (2016-02-13)
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  • How to Compute the Mean Particle Diameter from a LISST Volume Distribution | Sequoia Scientific
    0 190 0 190 2 1 28 0 256 0 512 3 1 51 0 360 1 080 4 1 79 0 616 2 464 5 2 11 0 853 4 265 6 2 49 1 041 6 246 7 2 93 1 429 10 003 8 3 46 3 035 24 280 9 4 09 4 071 36 639 10 4 82 4 419 44 190 11 5 69 4 818 52 998 12 6 71 5 714 68 568 13 7 92 6 218 80 834 14 9 35 6 252 87 528 15 11 03 6 151 92 265 16 13 02 6 360 101 76 17 15 36 6 288 106 896 18 18 13 6 311 113 598 19 21 39 6 732 127 908 20 25 25 7 726 154 52 21 29 79 8 252 173 292 22 35 16 9 573 210 606 23 41 49 10 666 245 318 24 48 96 11 581 277 944 25 57 77 11 843 296 075 26 68 18 12 214 317 564 27 80 45 11 177 301 779 28 94 94 9 434 264 152 29 112 04 6 993 202 797 30 132 21 4 750 142 500 31 156 02 3 128 96 968 32 184 11 2 300 73 600 VD VC dSum 180 751 3719 339 By definition the mean particle size in terms of size class number is now dSum VD dSum VC in this example 3719 339 180 751 20 57714 We can now see that the mean particle size in terms of size class numbers is somewhere between size class 20 and 21 i e somewhere between 25 25 and 29 79 µm Now round down dSum VC to the nearest integer in this case

    Original URL path: http://www.sequoiasci.com/article/how-to-compute-the-mean-particle-diameter-from-a-lisst-volume-distribution/ (2016-02-13)
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  • LISST-Deep | Categories | Sequoia Scientific
    OA Milligan TG Hill PS Chant RJ Jago CF Jones SE Krivtsov V Mitchelson Jacob G 2008 The influence Read more Random shaped particles LISSTs July 7 2008 Light scattering by random shaped particles and consequences on measuring suspended sediments by laser diffraction Sequoia July 7 2008 Agrawal YC Whitmire A Mikkelsen OA Pottsmith HC 2008 Light scattering by random shaped Read more How LISST instruments measure the size distribution and concentration of particles April 18 2008 How LISST instruments measure the size distribution and concentration of particles Sequoia Scientific April 18 2008 article identical to Application Note L001 Rev 10 2006 LISST instruments represent a new generation of systems Read more The size resolution of the LISST series of instruments April 18 2008 The size resolution of the LISST series of instruments Sequoia April18 2008 this article is identical to Application Note L008 The LISST instruments observe the multi angle scattering of light from an ensemble of particles in Read more Calibrating the LISST series instruments April 18 2008 Calibrating the LISST series instruments Sequoia April18 2008 this article is identical to Application Note L009 The LISST series of instruments measure particle size distribution i e the volume fraction contained in each of Read more Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight Accessories How to Buy Request

    Original URL path: http://www.sequoiasci.com/article_category/lisst-deep/page/4/ (2016-02-13)
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  • LISST-Portable | Categories | Sequoia Scientific
    Measuring Cement Powders September 5 2008 Sequoia September 5 2008 The particle size distribution PSD of a cement powder is important for its complete characterization From the PSD it is possible to compute the surface area of the cement powder which has a close correlation to the rate Read more Schlieren LISSTs July 7 2008 The influence of schlieren on in situ optical measurements used for particle characterization Sequoia July 7 2008 Mikkelsen OA Milligan TG Hill PS Chant RJ Jago CF Jones SE Krivtsov V Mitchelson Jacob G 2008 The influence Read more How LISST instruments measure the size distribution and concentration of particles April 18 2008 How LISST instruments measure the size distribution and concentration of particles Sequoia Scientific April 18 2008 article identical to Application Note L001 Rev 10 2006 LISST instruments represent a new generation of systems Read more Calibrating the LISST series instruments April 18 2008 Calibrating the LISST series instruments Sequoia April18 2008 this article is identical to Application Note L009 The LISST series of instruments measure particle size distribution i e the volume fraction contained in each of Read more Next More in About About Suspended Sediment Concentration and Particle Sizing Methods Course Staff News PiE Conference 2014 PiE Conference 2014 Customer List Newsletter Contact International Distributors Our Newsletter Sign up to get the latest news on Sequoia and our products Home Products Product Overview LISST Instruments LISST 100X LISST ABS LISST Portable XR LISST Holo LISST Deep LISST StreamSide LISST STX LISST Hydro LISST Infinite LISST VSF LISST STOKES Optical VSF Sensors LISST SL LISST 25X FlowControl Instruments FlowControl Lab FlowControl Sub Radiative Transfer Models EcoLight S HydroLight Accessories How to Buy Request a Quote Terms Of Sale Support FAQ Downloads Warranty Info Installation Requirements Responsibilities Warranty Register a Product Returns Contact

    Original URL path: http://www.sequoiasci.com/article_category/lisst-portable/page/4/ (2016-02-13)
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