The conductometric determination of the salt content of boiler water.

1960 ◽  
Vol 1 (6) ◽  
pp. A129
Keyword(s):  
Salt Content ◽  
Boiler Water

Titration of sulphates and lead using lead ion selective electrode

1981 ◽  
Vol 46 (2) ◽  
pp. 368-376 ◽  
Author(s):  
Josef Veselý
Keyword(s):  
Ionic Strength ◽  
Electrode Surface ◽  
Salt Content ◽  
Ion Selective Electrode ◽  
Lead Ion ◽  
Selective Electrode ◽  
Limit Of Determination ◽  
Total Salt Content ◽  
Automatic Titration

Titration of sulphates with lead perchlorate employing lead ion selective electrode indication was studied using additions of various organic solvents at different pH' and ionic strength values. As the optimum emerged systems with 60-70% 1,4-dioxane, pH' 5.3-5.6. After dehydration with sodium hydroxide, dioxane must be freed from the electrode surface-oxidizing impurities by their reduction with sodium metal and subsequent distillation. The method was applied to determination of sulphates in mountain spring waters. Units of ppm can be determined; the limit of determination, however, depends considerably on the content of dioxane, total salt content in the sample, and speed of the semi-automatic titration. Lead can be determined with EDTA in concentrations down to c(Pb2+) = 5 . 10-6 mol l-1.

scholarly journals An Experimental Demonstration of a Multi-element Flame Photometer: Determination of Salt Concentration in Soy Sauce

2015 ◽  
Vol 8 (1) ◽  
pp. 25 ◽  
Author(s):  
Hiu Tung Chu ◽  
Spencer E. Taylor
Keyword(s):  
Salt Content ◽  
Direct Analysis ◽  
Atomic Emission ◽  
Soy Sauce ◽  
Flame Photometry ◽  
Emission Spectrometry ◽  
Wide Range ◽  
Group 2 ◽  
The Uk

<p>The routine determination of some group 1 and group 2 metals is important because of their biological, physiological and industrial relevance. Flame atomic emission spectrometry, or flame photometry (FP), is well-suited to the determination of several alkali and alkaline earth metals which are easily ionized in a gas flame. Here, we consider the application of flame photometry as a simple but sensitive analytical method which is normally restricted to the determination of one element at a time. We have demonstrated the use of a new multi-element instrument for the simultaneous determination of four cations, namely Li<sup>+</sup>, Na<sup>+</sup>, K<sup>+</sup> and Ca<sup>2+</sup> in six different brands of soy sauce currently available in the UK. The Na<sup>+</sup> concentrations are compared with quoted nutrition values given on the product labels, and found to be in very good agreement for “low-salt” soy sauce, but some departures were noted in the higher salt products, the present results indicating higher salt content than the supplied data. Li<sup>+</sup> concentrations were below the detection limit (i.e., &lt;1 mg/L under the conditions used in this study). This demonstration study has shown multi-element flame photometry to be a straightforward means of analysing water-based products that could be more widely adopted for many different applications. Typical maximum concentrations for the direct analysis of aqueous solutions were found to be 50 mg/L (Li<sup>+</sup>), 200 mg/L (Na<sup>+</sup>, K<sup>+</sup>) and 1000 mg/L (Ca<sup>2+)</sup>. Although not the primary goal of this study, we noted some variance between the present results and values quoted on some of the products. This may relate to the use of indirect methods for estimating salt (sodium) concentrations. The use of flame photometry, however, would provide a rapid measurement of important cations in a wide range of applications.</p>

Determination of Salt in Butter

1966 ◽  
Vol 49 (3) ◽  
pp. 518-521
Author(s):  
Robert W Weik
Keyword(s):  
Individual Differences ◽  
Salt Content ◽  
Official Method ◽  
Significant Difference ◽  
Present Official Method ◽  
International Dairy Federation

Abstract The official AOAC, 15.135, and International Dairy Federation (IDF) methods for determining the salt content of butter have been collaboratively studied. Results indicated that there was no significant difference (P &gt; 0.05) between the method means. A highly significant difference (P &lt; 0.001) was found between laboratory means which reflected individual differences in performing titration procedures and slight deviations from the prescribed procedure. The overall results indicated that the IDF method as studied was as accurate as the longer present official method, and the IDF method is recommended for adoption as official, first action.

scholarly journals Use of Sieving as a Valuable Technology to Produce Enriched Buckwheat Flours: A Preliminary Study

Antioxidants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 583 ◽  
Author(s):  
Beatriz Martín-García ◽  
Federica Pasini ◽  
Vito Verardo ◽  
Ana María Gómez-Caravaca ◽  
Emanuele Marconi ◽  
...  
Keyword(s):  
Particle Size ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Starch Content ◽  
Salt Content ◽  
Total Phenolic ◽  
Physical Separation ◽  
Preliminary Study ◽  
Total Starch

Fractionation processes based on physical separation are a good strategy to produce enriched cereal flours. Therefore, the aim of this work is to evaluate the suitability of sieving of buckwheat flours to produce protein and phenolic (especially rutin) enriched fractions. Because of that, dehulled whole buckwheat flour (GSTQ) was sieved obtaining fractions with a particle size of 215 µm, 160 µm, 85 µm, and 45 µm (GS215, GS160, GS85, and GS45). For that purpose, the determination of protein, ash, and total starch content and free and bound phenolic compounds was carried out. The highest content of total phenolic compounds was obtained in GS215 (3118.84 mg kg−1 d.w.), followed by GS160 (2499.11 mg kg−1 d.w.), GS85 (989.46 mg kg−1 d.w.), GSTQ (983.15 mg kg−1 d.w.), and GS45 (481.31 mg kg−1 d.w.). Therefore, the phenolic content decreased with the particle size decrease from 215 µm to 45 µm. Besides, there were no significant differences between the total phenolic content in GS85 and GSTQ. The fraction with 215 µm reported the highest protein and mineral salt content and presented rutin amounts four times higher than GSTQ.

scholarly journals Selection of Method of Chemical Analysis in Measuring the Salinity of Mineral Materials

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 559
Author(s):  
Teresa Stryszewska ◽  
Marta Dudek
Keyword(s):  
High Performance ◽  
Salt Content ◽  
Technical Condition ◽  
Water Soluble ◽  
Aqueous Extracts ◽  
X Ray ◽  
Chloride Salts ◽  
Sulphate Salts ◽  
Selection Of

The article deals with the issue of salt content in brick buildings, which plays an important role in the assessment of the technical condition, in particular of historic buildings. A question has been asked about the selection of the best research method to determine the salinity of mineral materials. To obtain the answer, the authors conducted some tests on ceramic bricks salted with seven types of salt solutions. Research methods such as: spectrophotometry (UV), ion chromatography (High Performance Liquid Chromatography (HPLC)), X-Ray Fluorescence Spectrometry (XRF) and Energy-Dispersive X-Ray Spectroscopy (EDS) were compared. The above methods belong to two groups: the first is based on aqueous extracts and allows the determination of water-soluble salts, and the second concerns testing directly on the sample so that insoluble salts can also be determined. The results tests indicate that the methods based on solid phases (XRF and EDS) give higher salinity values than those based on aqueous extracts (HPLC and UV). The results were also analysed with regard to the type of salt. Larger differences are observed for sulphate salts while chloride salts are characterised by smaller differences. On this basis, it is concluded that the salt content of the material is best assessed using tests that make it possible to recognise the salt in question and its quantity.

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