For seven replicates of the sample, the mean must be 3. Method detection level mdlthe constituent concentration that, when processed through the complete method, produces a signal with a 99% probability that it is different from the blank. The table below illustrates the key differences between the dod standard and the nist standard. Quality assurance qa is a laboratory operations program that specifies the measures required to produce defensible data with known precision and accuracy. The nist standard nist 80088 accounts for more recent technologies and technical advancements. Most data sanitization software, including blancco drive eraser, supports multiple data sanitization methods, including dod 5220. Both iso 6060 method and standard method open reflux method, 5220b were used to determine the cod. Moreover, theres also a seven pass procedure of dod 5220. Pdf evaluation of cod determination by iso, 6060 method. A sample is refluxed in strongly acid solution with a known excess of potassium dichromate k 2 cr 2 o 7. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. Dilutionconcentration options 1020 quality assurance a.
After digestion, the remaining unreduced k 2 cr 2 o 7 is titrated with ferrous ammonium sulfate to determine the amount of k 2 cr 2 o 7 consumed and the oxidizable organic matter is calculated in. This variant of the dod standard uses for overwriting the data seven runs. This results in the change of chromium from the hexavalent vi state to the trivalent iii state. For solid or semisolid samples, several adapted methods have been proposed, using standard 5220bopen reflux and 5220dclosed reflux. The test kit is suitable for both onsite testing and.
The standard methods reference for toc in the new rules will be c 2011. Standard methods online standard methods for the examination of water and wastewater brief method summary. Both iso 6060 method and standard method open reflux method, 5220b were used to determine the cod values of a variety of water and wastewater samples. Both organic and inorganic components of a sample are procedures for cod. Demand cod is widely used in municipal and industrial laboratories to measure the overall. Pbss5220v 20 v, 2 a pnp low v cesat biss transistor. Cod closed reflux analysis was performed based on the 5250d method of the standard methods 41. Ast bearings is a premier supplier of 5220 double row angular contact ball bearing for a range of applications.
It helps you to permanently delete files, drives and folders. The open reflux method 5220b is suitable for a wide range of wastes where a large sample size is preferred. Evaluation of cod determination by iso, 6060 method, comparing. April 9, 2020 covid 19 maximum flexibility in employing alternative investigative methods april 8, 2020 guidance on industry fingerprint submissions for background investigations april 6, 2020 dod consolidated adjudications covid19 response march 30.
The biggest change is not within the method, but in the adhs method reference. Prex3000 pneumatic di erential pressure transmitter model kdp. By order of the executive director office of the federal register washington, d. However, in the cod evaluation, the concentration of hgso 4 used in the digestion solution was. Standard methods for the examination of water and wastewater.
View and download acer extensa 5220 service manual online. Because of its unique chemical properties, the dichromate ion cr2o7. Extensa 5620, travelmate 5320 series, travelmate 5720 series, travelmate 5720g, extensa 5220 series, extensa 5620 series. Standard methods for the examination of water and wastewater author. M short wipe and uses passes 1, 2, 7 from dod standard method. Introduction chemical oxygen demand cod is defined as the amount. The open reflux method b is suitable for a wide range of wastes where a large sample size is preferred.
The most recent standard is the special publication 80088 from nist, which is the goto data erasure standard for organizations in the united states. At the beginning of each of the subsequent parts of the manual. Methods chemical oxygen demand, method 5220 d, closed reflux. Disk wipe works with usb sticks, sd cards and other portable devices. Lipid production by rhodotorula glutinis from pulp and paper wastewater for biodiesel production. Acer extensa 5220 service manual pdf download manualslib. Both organic and inorganic components of a sample are subject to oxidation, but in. Differences between standard methods 5210 22nd and 23rd edition 5210 a. Changes in technology and data storage devices have forced the dod 5220. The model 5220 is an automatic mains failure control module.
When a request for inserting the cdrom for windows 98 appears, insert it into the cd drive and click the ok button. The nispom actually covers the entire field of governmentindustrial security, of which data sanitization is a very small part about two paragraphs in a 141page document. The quantity of oxidant consumed is expressed in terms of its oxygen equivalence. By overwriting the data on the storage device, the data is rendered. Gives different methods of measuring air flow rate in an air handling duct which, without the need of calibration, meet various specific requirements in the field of air distribution and air diffusion. The module also provides indication of operational status and fault conditions, automatically shutting down the genset and indicating failures by means of an lcd display, and appropriate. Before using a new method or instrument, you should determine its operational calibration range upper and lower limits. A modified method for cod determination of solid waste, using a. Chloride reacts with silver ion to precipitate silver chloride, and thus inhibits the catalytic activity of silver. This indian standard part 58 first revision was adopted by the bureau of indian standards, after the draft. Introduction 22nd edition 2001 23rd edition 2016 the seeding and dilution procedures provide an estimate of the bod at ph 6. The module is used to monitor a mains supply and automatically start a standby generator set. Furthermore, the nispom does not actually specify any particular method. When a sample is digested, the dichromate ion oxidizes cod material in the sample.
Aug 01, 2018 the nondod components identified in dod 5220. April 9, 2020 covid 19 maximum flexibility in employing alternative investigative methods april 8, 2020 guidance on industry fingerprint submissions for background investigations april 6, 2020 dod consolidated adjudications covid19 response march 30, 2020 covid19 nisp guidance march 30, 2020. Us department of defense in the clearing and sanitizing. The dod threepass standard was last updated in 2006, a time before many of todays technologies existed. Method f can be used in conjunction with methods b, c, d, or e to obtain a hydrocarbon measurement in addition to, or instead of, the oil and grease measurement.
Epa standard method 5220 d, standard methods for the examination of water and wastewater, 20th edition. Most types of organic matter are oxidized by a boiling mixture of chromic and sulfuric acids. The determination of chemical oxygen demand cod is widely used in municipal and industrial laboratories to measure the overall level of organic contamination in wastewater. The manual should include a policy that defines the statistical level of confidence used to express data precision and bias, as well as method. Differences between standard methods 5210 22nd and 23rd edition. This program is defined in a qa manual, written procedures, work instructions, and records. Om2 5220 1101 prex3000 pneumatic di erential pressure transmitter model kdp users manual.
Other related analytical values are biochemical as long as a 10. Epa on march 31, 2005 for wastewater compliance monitoring. Evaluate the technique and quality of reagents by conducting the test on a standard potassium hydrogen. Methods 5220c and d reduce these waste problems but may be less accurate and less representative 5220a. Awwa, wef, apha, 1998, standard methods for the examination of water and wastewater. Standard methods for the examination of water and wastewater, 23nd edition, 2017. This method makes use of silica gel to separate hydrocarbons from the total oil and grease on the basis of polarity. Chemical oxygen demand titrimetric, high level for. These nondod components have entered into agreements with the secretary of defense secdef, pursuant to e. Epa standard method 5220 d, standard methods for the. When a sample is digested, the dichromate ion oxidizes. Printing standard methods for the examination of water and. When a request for inserting the cdrom for windows 98 appears, insert it. Standard methods for the examination of water and wastewater represents the best current practice of american water analysts.
Aug 27, 2018 standard methods for the examination of water and wastewater represents the best current practice of american water analysts. Data erasure sometimes referred to as data clearing, data wiping, or data destruction is a softwarebased method of overwriting the data that aims to completely destroy all electronic data residing on a hard disk drive or other digital media by using zeros and ones to overwrite data onto all sectors of the device. Coagulationflocculation method for the treatment of pulp. Hach cod procedure, for the hach dr4000 spectrophotometer. Oxygen demand, chemical, dichromate method multirange. Printing standard methods for the examination of water. Cod ubes inclmance evaluation standard y cod quality control. Thermo orion method codl00 and codh00 revision 5, 03252005 accepted by u. The contamination level is determined by measuring the equivalent amount of oxygen required to oxidize. Aar r914610 approved methods and references key reference c american public health association et al. Standard methods for the examination of water and wastewater, 23nd edition. This method is an extended variant of the dod 5220. Differences between standard methods 5210 22nd and 23rd. Dodshort is the hsu minimum standard which equates to the us department of defense 5220 22.
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