methods used for chemical analysis of waters and sediments

... Specification for Gypsum Concrete C778 Specification for Sand C842 Specification for Application of Interior Gypsum Plaster D1193 Specification for Reagent Water D1428 Test Method for Test for Sodium and ... Calculate the percentage of sand in the sanded plaster as follows: X @ ~ C B ! / ~ A B ! # 100 (7) where: X = % of sand in sanded plaster, A = % of insoluble matter in the sand, B = % of insoluble matter ... results as a ratio of the parts of sand per part of plaster by weight, use the following equation: OPTIONAL PROCEDURE FOR ANALYSIS FOR SODIUM BY THE ATOMIC ABSORPTION METHOD Ratio of sand to plaster

Ngày tải lên: 13/10/2023, 11:47

... membrane of some kind that allows for selective exchange of the sought -for ion The glass electrode used for the measurement of hydrogen-ion activity and pH is the oldest and most widely used ion-selective ... Fred P., Methods Manual for Chemical Analysis of Water and Wastes, Alberta Environmental Centre, Vergeville, Alberta, Canada (1996) Garbarino, John R and Tedmund M Struzeski, Methods Of Analysis ... Some of these methods are still used today, and many have been adapted to instrumental and automated procedures The most common classical methods for pollutant analysis are titrations, largely used

Ngày tải lên: 23/07/2013, 20:57

... Scientific Research Development of a high-performance liquid chromatography method for simultaneously analysis of saponins and flavonoid in materials and dietary supplements containing Hedera ... Figure Chromatograms of blank sample (A), standard (B), dried ivy extract sample (C) Working standards at concentrations of 0.5 - 200 mg/L for saponins and 0.1 - 100 mg/L for the flavonoid with ... Barbier and G Pépin, “An unusual case of death: Suffocation caused by leaves of common ivy (Hedera helix) Detection of hederacoside C, α-hederin and hederagenin by LC-EI/MS,” Journal of Analytical

Ngày tải lên: 04/11/2022, 14:51

... Advances and Uses of Monolithic Columns for the Analysis of Residues and Contaminants in Food Mónica Díaz-Bao †, Rocío Barreiro, José M Miranda, Alberto Cepeda and Patricia Regal †,* Department of ... methodologies, with reduced analysis time In the last 30 years, high performance liquid chromatography (HPLC) has become one of the most frequently -used methods for the analysis of mixtures of compounds in ... development of analytical methods New methods and techniques should be developed to monitor the presence of residues and contaminants in food Generally, the analysis of this kind of sample requires

Ngày tải lên: 04/12/2022, 16:07

... temperature at 70°C A gradient of 40–50%B in 15 was used for dT40– 100, while a gradient change of 20%B in 20 was used for the other oligonucleotides Gradients of 30–50%B were used for dT1535, dT20, dA20, ... materials The authors also wish to thank Waters Corporation (Milford, MA, USA) for the loan of the Acquity Premier system and for the gift of the Waters columns used in this work [18] [19] [20] [21] ... and the column temperature at 40°C Gradient conditions were the same for all oligonucleotides A gradient of 55–25%B in 30 was used for Waters columns, while a gradient of 75– 45%B in 30 was used

Ngày tải lên: 20/12/2022, 21:33

... Calibration of energy scales for elemental analysis ISO 17974, Surface chemical analysis — High-resolution Auger electron spectrometers — Calibration of energy scales for elemental and chemical- state analysis ... energy of 10 keV and 1 nA current at 45° incidence to the specimen normal, rastered over an area of 200 nm by 200 nm, was used for the analysis 6.5 Information on the effectiveness of methods of ... charge-control methods in approximate order of simplicity of application This International Standard has two main areas of application First, it identifies information on methods of charge control and/ or

Ngày tải lên: 09/03/2024, 15:35

... Demand 28 2.3.2 Determination of Biochemical Oxygen Demand……………………… …29 2.3.3 Analysis of Ammonia content 30 2.3.4 Analysis of Nitrite and Nitrate 31 2.3.5 Procedure for ... TECHNICAL UNIVERSITY OF DRESDEN VNU UNIVERSITY OF SCIENCE Vienglasy Mangnomek INVESTIGATION ON A COMBINATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE TREATMENT OF PULP AND PAPER MILL WASTEWATER ... TECHNICAL UNIVERSITY OF DRESDEN VNU UNIVERSITY OF SCIENCE Vienglasy Mangnomek INVESTIGATION ON A COMBINATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE TREATMENT OF PULP AND PAPER MILL WASTEWATER

Ngày tải lên: 25/09/2020, 15:32

... Determination of Biochemical Oxygen Demand… 29 2.3.3 Analysis of Ammonia content 30 2.3.4 Analysis of Nitrite and Nitrate 31 2.3.5 Procedure for the determination of Phosphate ... TECHNICAL UNIVERSITY OF DRESDEN VNU UNIVERSITY OF SCIENCE Vienglasy Mangnomek INVESTIGATION ON A COMBINATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE TREATMENT OF PULP AND PAPER MILL WASTEWATER ... TECHNICAL UNIVERSITY OF DRESDEN VNU UNIVERSITY OF SCIENCE Vienglasy Mangnomek INVESTIGATION ON A COMBINATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE TREATMENT OF PULP AND PAPER MILL WASTEWATER

Ngày tải lên: 23/12/2021, 21:32

... Determination of Chemical Oxygen Demand 28 2.3.2 Determination of Biochemical Oxygen Demand……………………… …29 2.3.3 Analysis of Ammonia content 30 2.3.4 Analysis of Nitrite and Nitrate ... TECHNICAL UNIVERSITY OF DRESDEN VNU UNIVERSITY OF SCIENCE Vienglasy Mangnomek INVESTIGATION ON A COMBINATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE TREATMENT OF PULP AND PAPER MILL WASTEWATER ... TECHNICAL UNIVERSITY OF DRESDEN VNU UNIVERSITY OF SCIENCE Vienglasy Mangnomek INVESTIGATION ON A COMBINATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE TREATMENT OF PULP AND PAPER MILL WASTEWATER

Ngày tải lên: 13/07/2022, 16:09

... đới bờ biển Việt Nam ANALYSIS OF ENVIRONMENTAL AND ECOLOGICAL INDICATORS FOR SUSTAINABLE UTILIZATION AND MANAGEMENT OF MARINE RESOURCES: - Case study in the coastal waters of Quang Ninh – Hai ... activities and natural hazards The studied results on the initial analysis of these indicators in the coastal waters of Quang Ninh-Hai Phong show the critical degradation of coral and mangrove ... of the development activities of urbanization and economics such as coal mining, tourism, coastal aquaculture, etc The successful application of these indicators for quantitative assessment of

Ngày tải lên: 27/02/2024, 08:12

... ASTM Annual Book of Standards, Part 31, D3694-78 “Standard Practices for Preparation of Sample Containers and for Preservation of Organic Constituents,” American Society for Testing and Materials, ... present, add 80 mg of sodium thiosulfate per liter of sample and mix well EPA Methods 330.4 and 330.5 may be used for measurement of residual chlorine.9 Field test kits are available for this purpose ... based upon measurements of actual retention time variations of standards over the course of a day Three times the standard deviation of a retention time for a compound can be used to calculate a...

Ngày tải lên: 14/02/2014, 03:20

... secondary dilution standard be prepared at a concentration of 15 µg/mL of each internal standard compound The addition of 10 µL of this standard to 5.0 mL of sample or calibration standard would be ... detector This type of detector has proven effective in the analysis of wastewaters for the parameters listed in the scope (Section 1.1), and was used to develop the method performance statements ... the chemical analysis Additional references to laboratory safety are available and have been identified4,6 for the information of the analyst Apparatus and Materials 5.1 Sampling equipment, for...

Ngày tải lên: 14/02/2014, 03:20

... 51, and 86 101 103 96 61 and 98 63 65, 83, 85, 98, and 100 96 61 and 98 83 85 98 62, 64, and 100 97 99, 117, and 119 117 119 and 121 127 83, 85, and 129 112 63, 65, and 114 75 77 130 95, 97, and ... T.A and Lichtenberg, J.J “Semi-Automated Headspace Analysis of Drinking Waters and Industrial Waters for Purgeable Volatile Organic Compounds,” Measurement of Organic Pollutants in Water and ... derived in this report.) Methods 330.4 (Titrimetric, DPD-FAS) and 330.5 (Spectrophotometric, DPD) for Chlorine, Total Residual,” Methods for Chemical Analysis of Water and Wastes, EPA-600/4-79-020,...

Ngày tải lên: 05/03/2014, 21:20

... the analysis of wastewaters for derivatization products of the parameters listed in the scope (Section 1.1), and was used to develop the method performance statements in Section 14 Guidelines for ... present, add 80 mg of sodium thiosulfate per liter of sample and mix well EPA Methods 330.4 and 330.5 may be used for measurement of residual chlorine 10 Field test kits are available for this purpose ... a formal quality control program The minimum requirements of this program consist of an initial demonstration of laboratory capability and an ongoing analysis of spiked samples to evaluate and...

Ngày tải lên: 05/03/2014, 21:20

... a formal quality control program The minimum requirements of this program consist of an initial demonstration of laboratory capability and an ongoing analysis of spiked samples to evaluate and ... outside the range for accuracy, the system performance is unacceptable for that parameter Locate and correct the source of the problem and repeat the test for all parameters of interest beginning ... of 6.5 - 7.5 with sodium hydroxide solution or sulfuric acid 10.2 Add 100 mL of chloroform to the sample bottle, seal, and shake 30 seconds to rinse the inner surface (Caution: Handle chloroform...

Ngày tải lên: 14/03/2014, 20:20

... present, add 80 mg of sodium thiosulfate per liter of sample and mix well EPA Methods 330.4 and 330.5 may be used for measurement of residual chlorine.10 Field test kits are available for this purpose ... outside the range for accuracy, the system performance is unacceptable for that parameter Locate and correct the source of the problem and repeat the test for all parameters of interest beginning ... a formal quality control program The minimum requirements of this program consist of an initial demonstration of laboratory capability and an ongoing analysis of spiked samples to evaluate and...

Ngày tải lên: 14/03/2014, 20:20

... present, add 80 mg of sodium thiosulfate per liter of sample and mix well EPA Methods 330.4 and 330.5 may be used for measurement of residual chlorine.20 Field test kits are available for this purpose ... “Standard Practices for Preparation of Sample Containers and for Preservation of Organic Constituents,” American Society for Testing and Materials, Philadelphia Buglass, A.J., Challis, B.C., and ... prepare for use, place 100 g of alumina into a 500 mL reagent bottle and add mL of reagent water Mix the alumina preparation thoroughly by shaking or rolling for 10 minutes and let it stand for at...

Ngày tải lên: 22/03/2014, 14:20

... Area of the characteristic m/z for the parameter to be measured Ais = Area of the characteristic m/z for the internal standard Cis = Concentration of the internal standard Cs = Concentration of ... chloride for the serial extraction of the base/neutrals and 200 mL, 100 mL, and 100 mL volumes of methylene chloride for the acids 10.2 Mark the water meniscus on the side of the sample bottle for ... Standards, Part 31, D3694-78 “Standard Practices for Preparation of Sample Containers and for Preservation of Organic Constituents,” American Society for Testing and Materials, Philadelphia “Carcinogens-Working...

Ngày tải lên: 28/03/2014, 19:20

... hygiene—Thorough washing of hands and forearms after each manipulation and before breaks (coffee, lunch, and shift) 4.3.1.4 Confinement—Isolated work area, posted with signs, segregated glassware and tools, ... The frequency for the required analysis of a QC check standard will depend upon the complexity of the sample matrix and the performance of the laboratory 8.4.1 Prepare the QC check standard by adding ... a formal quality control program The minimum requirements of this program consist of an initial demonstration of laboratory capability and an ongoing analysis of spiked samples to evaluate and...

Ngày tải lên: 28/03/2014, 20:20