Total Hardness in Water.Stability of Standard Disodium Dihydrogan Ethylenediamine Tetraacetate Solutions

Goetz, C. A.; Loomis, T. C.; Diehl, Harvey

doi:10.1021/ac60042a016

Cited by 28 publications

(5 citation statements)

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“…This is confirmed by the authors' findings that 0.01 M Na2H2Y changed less than 0.05% in titer after storage in borosilicate glass or polyethylene bottles for 5 months. However, a decrease in titer of 1 % in four months on storage in soft glass bottles has been reported by Goetz, Loomis, and Diehl (9).…”

Section: Stability Of Solutionsmentioning

confidence: 72%

Purification and Properties of Disodium Salt of Ethylenediaminetetraacetic Acid as Primary Standard

Blaedel¹,

Knight²

1954

Anal. Chem.

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The perchloric acid was fumed for 5 minutes and the permanganate trap brought to boiling. The two vessels were heated for 10 minutes further after which time the current of air was discontinued and water baths initially at 85°C. were placed about the receivers for 15 minutes. The receiving solutions were transferred to a 50ml. volumetric flask; 1 to 1 ethyl alcohol-hydrochloric acid was used for rinsing and making up to volume. The resulting solution was filtered through a large Whatman's No. 42 filter paper into the transmittancy cell. A solution of 1 to 1 ethyl alcoholhydrochloric acid was used as a blank solution.Samples distilled into 3% hydrogen peroxide in the manner described previously, then distilled into thiourea from the peroxide solution to which 5 ml. of concentrated sulfuric acid were added, gave results in agreement with the standard curve.A standard curve was prepared by distilling aliquots of the ruthenium solution from perchloric acid. LITERATURE CITED(1)

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Section: Stability Of Solutionsmentioning

confidence: 72%

Purification and Properties of Disodium Salt of Ethylenediaminetetraacetic Acid as Primary Standard

Blaedel¹,

Knight²

1954

Anal. Chem.

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“…Additional information on the principle of the determination is given by Goetz, Loomis, and Diehl (1950) and Botha and Webb (1952).…”

Section: Complexometric Methods I Summary Of Methodsmentioning

confidence: 99%

Methods for collection and analysis of water samples for dissolved minerals and gases

Brown¹,

Skougstad²,

Fishman³

1970

179

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The Department of the Interior has a basic responsibility for the appraisal, conservation, and efficient utilization of the Nation's natural resources including water as a resource as well as water involved in the use and development of other resources. As one of the several Interior agencies, the U.S. Geological Survey's primary function in relation to water is to assess its availability and utility as a national resource for all uses. The Geological Survey's responsibility for water appraisal includes not only assessments of the location, quantity, and availability of water, but also determinations of water quality. Inherent in this responsibility is the need for extensive water-quality studies related to the physical, chemical, and biological adequacy of natural and developed surface-and groundwater supplies. Included, also, is a need for supporting research to increass the effectiveness of these studies. As part of its mission the Geological Survey is responsible for a large part of water-quality data for rivers, lakes, and ground water that is used by planners, developers, water-quality managers, and pollution-control agencies. A high degree of reliability and standardization of these data is paramount. This manual was prepared to provide accurate and precise procedures for the collection and analysis of water samples required for these needs. The series of manuals on techniques describes procedures for planning and executing specialized work in water-resources investigations. The maaterial is grouped under major subject headings called books and further subdivided into sections and chapters; Section A of Book 5 is on water analysis. The chapter on dissolved minerals and gases is the first in this series of chapters on laboratory methods for water-quality analysis. The unit of publication, the chapter, is limited to a narrow field of subject matter. This format permits flexibility in revision and publication as the need arises. Provisional drafts of chapters are distributed to field offices of the U.S. Geological Survey for their use. These drafts are subject to revision because of experience in use or because of advancement in knowledge, techniques, or equipment. After the technique described in a chapter is sufficiently developed, the chapter is published and is for sale by the Superintendent of Documents,

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“…Determination of total hardness was carried out by complexometric EDTA titration that uses Erichrome black T (EBT) as an indicator. In order to maintain pH of the solution between 9-10, NH4Cl+NH4OH was used as a buffer and the readings were noted for concordant values [32]. Turbidity was determined by using turbidimeter.…”

Section: Instrumentation and Proceduresmentioning

confidence: 99%

Physicochemical and Spectroscopic Elemental Analysis of Ground Water in Thickly Populated and Industrial Area of Quetta Valley Pakistan

Khan

Kakar

Khan

et al. 2019

ANJS

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Quetta valley the capital of Balochistan Province, has faced twice the rush of immigrants i.e; Afghan refugees after Saur Revolution and people from interior Balochistan due to drought in Balochishan from the last two decades. Additionally a number of industries at various areas has been established. This abrupt increase in the population and discharge from the industries have affected the drinking water quality in the valley. To assess these affects, nine ground water samples taken from densely populated and industrial areas were analyzed for their physicochemical (taste, order, color, temperature, conductivity, turbidity, alkalinity, pH, total hardness and total dissolved salts) and concentrations of cations (Na, K, Fe, Mn, Co, Ni, Cu, Cd and Pb) by Flame Photometer and Atomic Absorption Spectrometer. The results obtained were compared with both Pakistan National Standards (PNS) for drinking water Quality (2010) and World Health Organization (WHO), standards for drinking water. All the results were in the limits of the standards except cobalt (0.095-0.12 mg/L) and cadmium (0.0348-0.041 mg/L) which were found to be in high concentrations that are attributed to the anthropogenic activates.

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Total Hardness in Water.Stability of Standard Disodium Dihydrogan Ethylenediamine Tetraacetate Solutions

Cited by 28 publications

References 0 publications

Purification and Properties of Disodium Salt of Ethylenediaminetetraacetic Acid as Primary Standard

Purification and Properties of Disodium Salt of Ethylenediaminetetraacetic Acid as Primary Standard

Methods for collection and analysis of water samples for dissolved minerals and gases

Physicochemical and Spectroscopic Elemental Analysis of Ground Water in Thickly Populated and Industrial Area of Quetta Valley Pakistan

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