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DMA-1 Direct Mercury AnalyzerMILESTONEw w w. m i l e s t o n e s r l . c o mH E L P I N GC H E M I S T S
8 good reasons to choose the milestone DmA-11. no sample preparation2. ease of use3. lowest cost of analysisThe DMA-1 does not require anysample preparation or other wetchemistry prior the analysis.This means ease of use, low runningcost and no need for hazardouschemicals to purchase, handle anddispose.Just weigh your sample, load it ontothe instrument and press ‘start’.The DMA-1 is so simple to use that itcan be operated in the field, not onlyin the analytical laboratory.Ease of use, speed of analysis,catalyst and amalgamator longlifetime, sample boats durabilityand the possibility of using air ascombustion and carrier gas minimizethe DMA-1 cost of analysis.
4. Best analytical performanceCombining an innovative mercurymeasuring system with a uniqueoptical path spectrophotometer,the DMA-1 achieves a detectionlimit as low as 0,003 nanograms ofmercury and is capable of measuringup to 1.500 nanograms of mercury,equivalent to a concentration of 15mg/kg (15 ppm) on a 100 mg sampleanalysis.ˆ1 1.2722Typical DMA-1 absorbance profile.The 1st peak is related to themore sensitive longer cell,while the 2nd peak correspondsto the shorter cell.W0.5 4.10sˆ2 0.1611W0.5 5.55s02 04 06 08 10 12 14 16 18 20 22 24 26 28 30 32 34 365. Official methods complianceThe DMA-1 is compliant with theUS EPA method 7473 (Mercury insolids and solutions by thermaldecomposition, amalgamation,and atomic absorptionspectrophotometry), with ASTMmethod D-6722-01 (Total mercury incoal and coal combustion residues)and ASTM method D-7623-10 (Totalmercury in crude oil).Time [s]6. High productivity7. easy maintenance8. largest installed baseThe DMA-1 is incredibly fast.Sample weight is automaticallytransferred from the analyticalbalance to the instrument, and acomplete analysis -start to finish,takes just 5 minutes.All the DMA-1 components, such asthe catalytic furnace, amalgamatorand spectrophotometer, are easilyaccessible for routine cleaning andmaintenance.With over 1300 units installed in80 different Countries worldwide,Milestone is the acknowledgedmarket leader in direct mercurydetermination.Our extensive experience enablesus to provide the highest level ofapplication and service support.
milestone DmA-1How it worksThe Milestone DMA-1 is a direct mercury analyzer of solid, liquid,and gas samples.Analysis time is 5 minutes only and no sample preparation isrequired.The DMA-1 is based on the principles of sample thermaldecomposition, mercury amalgamation and atomic absorptiondetection.The DMA-1 shares the same technology of the Milestone DMA-80,the most successful direct mercury analyzer in the market with over1300 units installed in 80 different Countries worldwide.The sample is weighed into a quartz vial, and its weightautomatically transferred from the analytical balance to the DMA-1.Sample vial is then loaded onto the instrument.Sample is dried and then thermally decomposed in an oxygen-richstream.Mercury and other combustion products are released and flownthrough the catalyst, where all interfering substances, such ashalogens and nitrogen or sulfur oxides, are eliminated.Mercury is selectively trapped by gold amalgamation, while othercombustion by products are flushed off.The amalgamation furnace is heated and mercury is rapidlyreleased.Mercury is finally carried into multiple measuring cells positionedalong the optical path of the spectrophotometer, and quantitativelymeasured by atomic absorption at 253,65 nm.
DmA-1 user interfaceThe DMA-1 is operated via acompact control terminal with easyto-read, bright, full-color, touchscreen display or, alternatively, by aWindows-based computer.The terminal is provided with multipleUSB and RS-232 ports for directprintouts of methods and runs, andfor interfacing the instrument to anexternal balance.The terminal runs Milestone’s uniqueEasyCONTROL software, providingsimple and intuitive, but extremelyflexible and powerful control over theanalytical process.All sample parameters, includingfurnace temperatures, methodprofiles, absorbance signals, results,and calibrations are saved.They can be viewed, easilytransferred using a USB memory stickor integrated to LIMS LaboratoryInformation Management Systems.EasyCONTROL software includes theunique AutoBLANK feature.If, following the analysis of a samplewith a very high mercury content,the pre-set blank level is exceeded;EasyCONTROL will automatically runblank cycles until the pre-set blanklevel is achieved.EasyCONTROL allows the operatorto designate certain samples asreference, or QC samples.Once a sample is designated as areference, a known concentrationvalue is entered.If the analysis of that sample yields aconcentration outside the acceptablerange specified by the operator,EasyCONTROL can be pre-set toeither continue, stop, or pause theanalysis of the remaining samples.EasyCONTROL software is fullycompliant with FDA regulations 21CFR Part 11.
milestone DmA-1 analytical performanceThe DMA-1 produces accurate resultsover a wide dynamic range and on avariety of different matrices.The results below refer to analyseson solid certified reference materialswith a mercury concentration rangingfrom 5 μg/kg to nearly 5 mg/kg.SampleCertified (μg/kg)DMA-1 (μg/kg)NIST 1568a Rice Flour5,8 0,55,9 0,2BCR-277R Estuarine Sediment128 17121 2DORM-4 Fish Protein410 55375 3NIST 2781 Domestic Sludge3.640 2503.757 88BCR EC 680k Polythene4.640 2204.780 94sample matrixPrecisionThe DMA-1 produces matrixindependent results.The instrument is calibrated usingaqueous standards and then analyzesorganic and inorganic solid samples.Just one method is used to analyzea variety of different matrices makingthe DMA-1 extremely easy to use.The DMA-1 provides reproducibleresults over a broad range of samples,such as polymers, food and feed,and oils, for instance.Crude Oilaverage 22,15sd 0,53RSD 2,4%265250Hg concentrationAccuracy2352202051901751234Run56
stabilitysample amount1,6Hg concentrationUp to 1,5 grams of solid or 1,5 mL ofliquids can be analyzed.This is particularly important for theanalysis of heterogeneous materialsor for samples with a very lowmercury concentration.The graphic shows results obtainedon NIST 2709 (San Joaquin Soil),a certified reference materialwith known mercury contentof 1.32- 1.48 mg/kg.The instrument calibration lasts formonths of operation, and the resultsare stable over time.1,20,80,40,10,51,01,5Runmemory effectThe DMA-1 does not virtually sufferfrom any memory effect.The instrument software features the‘Autoblank’ function, by which theuser preset a satisfactory blank level.If that level is exceed the instrumentautomatically runs blank cycles untilthe expected level is reached.This is important when analyzing aseries of unknown samples.ˆ1 1.1273The graphic shows theabsorbance peak for a1-mg/kg mercury solutionand the subsequentprofile of blank run.W0.5 5.15sˆ2 0.0758W0.5 8.75sˆ1 0.0021W0.5 3.60s
Gas analysisMilestone Sorbent Traps expand the capabilities of the DMA-1,enabling the measurement of mercury in gases.Simply sample the gas, through a dedicated mass flow controller,using the Sorbent Traps, and load them onto the DMA-1.Total mercury (elemental and oxidized forms) is quantitativelymeasured in 5 minutes.Sorbent Traps are reusable and extremely easy to operate.MILESTONEH E L P I N GC H E M I S T SUNI EN ISO 9001: 2008 CERTIFIEDMILESTONE SrlVia Fatebenefratelli, 1/5 - 24010 Sorisole (BG) - ItalyTel: 39 035 573857 - Fax: 39 035 575498www.milestonesrl.com - email: analytical@milestonesrl.comMILESTONE INC.25 Controls Drive - Shelton, CT 06484 - USATel: (203) 925-4240 - Toll-free: (866) 995-5100 - Fax: (203) 925-4241www.milestonesci.com - email: mwave@milestonesci.comMILESTONE GENERAL K.K.KSP, 3-2-1, Sakado - Takatsu-Ku, Kawasaki 213-0012 - JapanTel: 81 (0)44 850 3811 - Fax: 81 (0)44 819 3036www.milestone-general.com - email: info@milestone-general.comMLS GmbHAuenweg 37 D-88299 Leutkirch im Allgau - GermanyTel: 49 (0)7561 9818-0 - Fax: 49 (0)7561 9818-12www.mls-mikrowellen.de - email: mws@mls-mikrowellen.deIn Your Country:CAT344EN-001sorbent traps
The Milestone DMA-1 is a direct mercury analyzer of solid, liquid, and gas samples. Analysis time is 5 minutes only and no sample preparation is required. The DMA-1 is based on the principles of sample thermal decomposition, mercury amalgamation and atomic absorption detection. The DMA-1 shares the same technology of the Milestone DMA-80,
