post

Synergistic effects of anionic polyacrylamide and gypsum ...

Therefore, P anions are potentially most mobile (Margenot et al., C. Niyungeko et al. / Chemosphere 234 (2019) 953e961 959 Table 7 Multiple linear regression analysis on the release of total dissolved P (TDP) over PAM and gypsum (Gy) applied together on different soils receiving biogas slurry (BS).

Read More
post

ASTM International - ASTM C471M-01 - Standard Test Methods ...

Dec 10, 2001· 1.1 These test methods cover the chemical analysis of gypsum and gypsum products, including gypsum ready-mixed plaster, gypsum wood-fibered plaster and gypsum concrete. Note 1-Gypsum reference standard materials, prepared by Domtar, Inc are available through Brammer Standards Company, Inc. <> 1.2 The test methods appear in the following order:

Read More
post

Sodicity and Remediation of Sodic Soils in North Dakota ...

Sodicity, according to Natural Resources Conservation Service (NRCS), is the degree to which a soil is affected by sodium (Na), expressed as the sodium adsorption ratio (SAR) of sodium ions (Na +) to the total of calcium ions (Ca +2) and magnesium ions (Mg +2) from a saturation extract.The formula is (Na +)/√((Ca +2 + Mg +2)/2), where units of each cation are millimoles per liter (mmol (c) /L).

Read More
post

Effect of Gypsum and Farmyard Manure on Selected ...

Agricultural Research center during 2018 cropping season to evaluate effects of Gypsum and farmyard manure on selected physicochemical properties of saline sodic soil. Factorial combinations with three rates of farmyard manure(0, 10 and 20 t ha-1) and five rates of gypsum (0%, 25%, 50%, 75%, soil gypsum requirement) were

Read More
post

NOTES AND COMMENT - Wiley Online Library

Analysis by the ammonium acetate method indi- cated that it was 99.33 -t- 0.63% CaS04. 2H20. Average results obtained by gravi- metric analysis and atomic abso,rption anal- ysis are given in Table 2. The sample is almost pure gypsum. Val- ues for calcincd gypsum and excess suIfite

Read More
post

PRODUCTION OF SULFUR FROM GYPSUM AS AN …

An overall bioconversion capacity of 11 kg / m3.day of gypsum and 1.2 kg / m3.day of dissolved organic carbon has been achieved in the two-stage bioreactor. INTRODUCTION. Gypsum (CaSO4. 2H2O) is produced by increasingly more industrial processes, for instance, when calcium carbonate or lime is used to neutralize sulfuric acid containing

Read More
post

International Scientific Indexing (ISI)

Method/Analysis: The wear down rate and frictional properties of the composite were learned by using the dry sliding wear test with a pin on disk wear tester. The investigation was carried out with 1750 meters of sliding distance and 1.55m/s of stable sliding velocity over different loads by 10N and 20N for aluminium metal matrix composite.

Read More
post

ASTM-C471M | Standard Test Methods for Chemical Analysis ...

1.1 These test methods cover the chemical analysis of gypsum and gypsum products, including gypsum ready-mixed plaster, gypsum wood-fibered plaster and gypsum concrete. Note 1—Gypsum reference standard materials, prepared by Domtar, Inc are available through Brammer Standards Company, Inc. 1.2 The test methods appear in the following order:

Read More
post

Standard Test Methods for Chemical Analysis of Gypsum and ...

plaster, gypsum wood-fibered plaster and gypsum concrete. NOTE 1—Gypsum reference standard materials, prepared by Domtar, Inc are available through Brammer Standards Company, Inc. 1.2 The test methods appear in the following order: Sections Alternative Procedure for Analysis for Calcium Sulfate by Ammonium Acetate Method 17-22

Read More
post

Sodicity and Remediation of Sodic Soils in North Dakota ...

Soil Sampling and Analysis. ... Ammonium acetate is added as extractant to the soil as in Figure 12; however, the extraction solution then is discarded. A potassium solution then is used to saturate the soil, resulting in removal of the ammonium ions from step B, then the ammonium is analyzed to provide the real CEC. ... Gypsum can come from a ...

Read More
post

Aoac-official Method Of Analysis-compiled Copy-2012 ...

Method of analysis whose response is either the presence or absence of the analyte detected either directly or indirectly in a specified test portion. 3.22 Quantitative Method Method of analysis whose response is the amount (count or mass) of the analyte measured either directly (e.g., enumeration in a mass or a volume), or indirectly (e.g ...

Read More
post

A New Preparation Method of Microfauna from Gypsum ...

Evaporitic gypsum deposits represent an important paleoenvironmental record of the Miocene Badenian of the Carpathian Mountains belt. In this study, we developed a nontoxic method to concentrate calcareous microfossils from gypsum (CaSO4·2H2O), by treating the sulfate with ammonium acetate. We applied the newly developed method to gypsum …

Read More
post

FAD: Analytes - UNF

In the first method, streams of acidified seawater and 1 M ammonium acetate were mixed and the resulting solution was pumped through a microcolumn (1 cm x 2.5 mm i.d.) packed with diethylenetriamine sorbent for 3-10 min. After washing the column with water, elution was effected by pumping a carrier stream of 0.5 M HCl through the column for 80 s.

Read More
post

Investigation of Soil Amendments for Use in Golf Course ...

determined via the ammonium acetate pH 7.0 method (Soil Survey Laboratory Staff, 1996). Five grams of soil media were placed in leaching tubes and leached with 25 mL of 1 M NH4OAc. Leaching tubes were then closed and an additional 25 mL 1 M NH4OAc were applied and soil media remained in solution for 48 h. Leaching tubes

Read More
post

Effect of gypsum for reclamation of tidal land soil

with neutral 1 M ammonium acetate, and concentrations were determined using atomic absorption spectro-photometry (Perkin Elmer 2380, USA). The ESP was estimated using direct determination of exchangeable Na+ and CEC, and physical properties of soil texture and bulk + gypsum gypsum + in )

Read More
post

METHOD 9080 CATION-EXCHANGE CAPACITY OF SOILS …

2.1 The soil is mixed with an excess of 1 N ammonium acetate solution. This results in an exchange of the ammonium cations for exchangeable cations present in the soil. The excess ammonium is removed, and the amount of exchangeable ammonium is determined. 3.0 INTERFERENCES 3.1 Soils containing appreciable vermiculite clays, kaolin, halloysite,

Read More
post

ThermoML:J. Chem. Eng. Data 2019, 64, 12, 5132-5141

Solubility Behavior of Calcium Sulfate Dihydrate (Gypsum) in an Aqueous Sodium Chloride System in the Presence of Hydroxyalkyl Ammonium Acetate Ionic Liquids Additives: Morphology Changes and Physicochemical Solution Properties at 35 degC Shukla, J.[Jignesh], Mehta, M. J.[Mohit J.], Kumar, A.[Arvind] J. Chem. Eng. Data 2019, 64, 12, 5132-5141

Read More
post

(PDF) Methods of analysis | Harry Oses - Academia.edu

Apparatus: Shaker, plastic bottle with caps, cylinder, beaker. Reagents: Ammonium acetate 1 N: To 700 – 800 ml distilled water, add 57 ml. conc. acetic acid + 68 ml of conc. ammonium hydroxide. Dilute to a volume of 1 liter and adjust to pH 7.0 by the addition of more ammonium hydroxide or acetic acid. The same solution can be also made by ...

Read More
post

ASTM-C471M | Standard Test Methods for Chemical Analysis ...

Gypsum Using a Moisture Balance Alternative Procedure for Analysis of Combined Water in . 18 Gypsum Using a Moisture Balance Alternative Procedure for Analysis for Calcium Sulfate by . 19 Ammonium Acetate Method Alternative Procedure for Analysis for Sodium Chloride by . 20 the Coulometric Method

Read More
post

Soil and Plant Analysis Laboratory Manual - Google Books

1-L volume Acid Solution Add 10 mL Agron air-dry soil aliquot ammonium acetate Apparatus beaker bicarbonate block-digester Boron bring to 1-L bring to volume buffer solution CaCO calcium CALCULATION calibration curve carbonate chemical chloride concentrated sulfuric acid cool crop CWANA region desiccator determination digestion tube Dissolve ...

Read More
post

IS 8272 (1984): gypsum plaster for use in the manufacture ...

INSOLUBLE IN AMMONIUM ACETATE SOLUTION A-l. REAGENTS A-l.1 Ammonium Acetate Solution - Ammonium acetate shall be of the analytical reagent quality. It shall be prepared by dissolving 450 g of ammonium acetate in 2 litres distilled water conforming to IS : 1070-1977". The solution shall be made distinctly alkaline by

Read More
post

Ammonium sulfate | (NH4)2SO4 - PubChem

Ammonium sulfate is an inorganic sulfate salt obtained by reaction of sulfuric acid with two equivalents of ammonia.A high-melting (decomposes above 280℃) white solid which is very soluble in water (70.6 g/100 g water at 0℃; 103.8 g/100 g water at 100℃), it is widely used as a fertilizer for alkaline soils. It has a role as a fertilizer.

Read More
post

Standard Test Methods for Chemical Analysis of Gypsum and ...

Alternative Procedure for Analysis of Organic Material . 19 and Carbon Dioxide in Gypsum by High Temperature Weight Loss Alternative Procedure for Analysis for Calcium Sulfate by . 20 Ammonium Acetate Method Alternative Procedure for Analysis for Sodium Chloride by . 21 the Coulometric Method

Read More
post

PFP7 Flame Photometer Protocol: P05-002A - Jenway

form of gypsum (calcium sulphate) is added to the soil, promoting soil aggregation. Calcium displaces sodium from the soil particles, allowing it to be leached from the root zone with rainfall and irrigation. Sodium is extracted from air-dried soil samples by soaking in neutral ammonium acetate solution for …

Read More
post

7. ANALYTICAL METHODS

Subsequent analysis of atrazine-containing samples by GC-MS analysis permitted a detection limit of atrazine of 0.002 µg/g (2 parts per trillion). The use of XAD-2 resins (Baun and Nyholm 1996) has been applied to bioassay of atrazine and the SEP-PAK preconcentration has been used prior to GC analysis (Mojasevic et al. 1996; Novak and Watts 1996).

Read More
post

Exchangeable cations : cation exchange capacity

Exch. Mg by N sodium acetate corrected by the solubility of dolomite in the extractant. Exch.Na+K: by N ammonium acetate corrected for soluble ~a and K found in the soil (sic). The three methods of CEC determination compared are: a) ~onium acetate replacement, washing out by NH4Cl and tjen ethanol and distillation of ammonium.

Read More
post

Amelioration of Saline Soil by the Application of Gypsum ...

A pot experiment was conducted to investigate the effect of cow dung, rice husks, calcium chloride and gypsum on soil reclamation and compare the effect of organic and inorganic amendments on soil reclamation during the period of 5th March to 20th April, 2017. The experiment was laid to fit a completely randomized design (CRD) with seven treatments [Reference soil (T0), Cow dung (T1), Rice ...

Read More
post

Soil Testing Procedures for Calcareous Soils

Mar 04, 2011· a neutral pH ammonium acetate extractant (pH 7.0), and the elevated pH ammonium acetate solution (>pH 8.0) (Table 1). The problem is this: when testing a soil that contains cal-cium carbonate, magnesium carbonate, or gypsum, the acid and neutral pH extractants overestimate calcium (Ca) Green Section Record Vol. 49 (9)

Read More
post

Titration of Quanternary Ammonium Compounds in …

Default Method Method type Automatic titration Modus Dynamic Measured Value mV Measuring Speed / Drift User-defined Minimum Holding Time Maximum Holding Time Measuring Time Drift 08 s 25 s 04 s 3 mv/min Initial Waiting Time 0 s Dynamic User-defined Max Step Size Slope Max ml Min. Step Size Slope Min. ml 0.5 ml 7 0.075 ml 50 Damping Weak ...

Read More
post

Standard Test Methods for Chemical Analysis of Gypsum and ...

C471M - 17 Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric), ammonium acetate method, atomic absorption, chemical analysis, coulometric method, flame photometry, gas chromatography/electron capture detector, gas chromatography/mass spectrometry, gypsum, gypsum concrete, gypsum board, gypsum products, high-performance liquid …

Read More
post

US4096869A - Formulation for the dissolution of gypsum ...

gypsum range solvent acid agent Prior art date 1977-05-05 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/794,277 Inventor Michael B. Lawson

Read More
post

National Acid Sulfate Soils Guidance: National acid ...

Figure 3.2 Flow chart for the analysis of dry and wet soil samples.12. ... (for example gypsum) (Sullivan et al. 1999). ... (a hazardous gas) can be evolved after the acid is added to the zinc acetate trapping solution. Consequently, this part of the procedure should be: 1) carried out with a minimum of delay after the acid has been added, and ...

Read More
post

Soil Evaluation Methods for Calcium for Peanut (Arachis ...

Jan 01, 2017· The M1 method is used because it is a routine soil test for Ca, K, Mg, and P for all crops in this region, and is thus convenient for evaluation. Other methods, such as Mehlich 3 (M3) and 1 N neutral ammonium acetate (AA), are also widely used for Ca and may be used in other peanut producing regions (i.e., M3 in North Carolina).

Read More
post

ASTM C471M-01(2012) Standard Test Methods for Chemical ...

Jan 15, 2014· ASTM C471M-01 (2012) This test method covers the determination of calcium sulfate in gypsum and gypsum products by extraction with ammonium acetate solution. 1.1 These test methods cover the chemical analysis of gypsum and gypsum products, including gypsum ready-mixed plaster, gypsum wood-fibered plaster and gypsum concrete.

Read More
post

PRICE LIST FOR ANALYSES SOIL CHARACTERIZATION …

d) Samples with gypsum (Gypsum analysis required – additional charge) $65.00 Extractable bases (Ca, Mg, Na, K – Ammonium acetate extraction) $50.00 Cation exchange capacity (Sodium acetate/ammonium acetate extraction) $55.00 Water soluble salts/SAR – Saturated paste

Read More
post

Research YouCan Use SoilTesting Methods for Sand-Based ...

The NH4Cl (ammonium cWoride) method (5), which utilizes calculations and corrections to estimate the amount of calcium carbonate that was dissolved, reduced extractable Ca concentrations compared to ammonium acetate at pH 7.0 (NH40Ac pH 7.0) and Mehlich 3. But, due to the labor involved with the several post-extraction procedures

Read More
post

ASTM International - ASTM C471M-16 - Standard Test Methods ...

Jan 01, 2016· Alternative Procedure for Analysis for Calcium Sulfate by Ammonium Acetate Method: 19: Alternative Procedure for Analysis for Sodium Chloride by the Coulometric Method: 20: Determination of Sand in Set Plaster: 21: Wood-Fiber Content in Wood-Fiber Gypsum Plaster: 22: Optional Procedure for Analysis for Sodium by the Atomic Absorption Method: 23

Read More