STUDIES ON THE DETERMINATION OF PH/EC/TDS LEVELS IN THE GUTÂI MOUNTAINS DRINKING WATER FROM MARAMUREŞ

2020 ◽  
Vol 34 (2) ◽  
pp. 23-30
Author(s):  
Aurica Pop ◽  
Keyword(s):  
Drinking Water ◽  
Baia Mare ◽  
Lcd Display ◽  
High Range

The paper showcases research conducted in order to determine pH, EC and TDS levels in the drinking water sampled from a spring located at an altitude of 925 meters at the edge of the DN18 road, which connects Shighetu Marmaţiei and Baia Mare, in Maramureş, Romania. A Tester Combo HI98130 was used for this experiment, a tester which is waterproof, extremely accurate and it can measure high range (0.00 - 20.00 mS/cm, EC/0.00 - 10.00 ppt TDS) EC/TDS and temperature. The results of the experiment are: pH = 7.25, EC = 0.08 mS/cm, TDS = 0.04 ppt at a temperature of 27,60C. This waterproof floating combined tester comes equipped with an easy to read LCD display and automatic stop. On top of that, pH and EC/TDS readings are automatically compensated by temperature (ATC) in order to prevent temperature related variations when taking measurements.

STUDIES ON THE DETERMINATION OF THE TOTAL HARDNESS OF THE DRINKING WATER COMING FROM THE "FÂNTÂNILE RECI" SPRING IN MARAMUREŞ

2020 ◽  
Vol 34 (2) ◽  
pp. 65-73
Author(s):  
Aurica Pop ◽  
Keyword(s):  
Drinking Water ◽  
Optical System ◽  
Interference Filter ◽  
Total Hardness ◽  
Light Sources ◽  
Narrowband Interference ◽  
Led Lights ◽  
Reference Detector ◽  
High Range

The paper showcases research conducted in order to determine the total hardness of the drinking water coming from the "Fântânile Reci" spring, located at the edge of the DN18 road, at the end of the Mara town, in Maramures, Romania. A HI97735 advanced portable photometer was used for this experiment. The photometer can perform low, medium and high range measurements of the total hardness of the water samples. The counter comes equipped with a superior optical system which uses a reference detector and a narrowband interference filter used for extremely quick and repeatable measurements. The values obtained as the result of the experiment are: 204 mg/l CaCO 3 (Total Hardness MR), 15,2 °E, 12,2°dH and 21,7°f. The LED light sources are superior compared to the tungsten lamps. LED lights are more efficient, providing more light while using less energy, and they produce little heat, which could otherwise affect the electrical balance.

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

Determination of Hg(II) in drinking water by atomic absorption spectrometry - Cold vapour method after concentration by column extraction chromatography

1984 ◽  
Vol 49 (5) ◽  
pp. 1134-1139 ◽  
Author(s):  
Zdeněk Šmejkal ◽  
Jitka Tauferová ◽  
Mária Madová ◽  
Zlatica Teplá
Keyword(s):  
Drinking Water ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Extraction Chromatography ◽  
Absorption Spectrometry ◽  
Average Yield ◽  
Water Mains ◽  
Cold Vapour ◽  
Column Extraction

The method describes concentration of mercury in samples of drinking water from water mains with Hg concentration above 1.0 . 10-7 g l-1 (5.0 . 10-10mol l-1) by means of extraction chromatography on a column packed with a carrier Synachrom E-5 wetted with saturated solution of bis(diethyldithiocarbamate)copper(II) complex in 1 : 1 mixture 1,2-dichlorobenzene + cyclohexane. After elution with 3.0 mol l-1 HCl the mercury concentration in the eluate is determined by atomic absorption spectrometry - cold vapour method. Average yield of the mercury separation from the model solutions was 95.8%.

Multi-Array Wax Paper-Based Platform for the Pre-Concentration and Determination of Silver Ions in Drinking Water

Talanta ◽  
2021 ◽  
pp. 122474
Author(s):  
Neda Bagheri ◽  
Stefano Cinti ◽  
Eleonora Nobile ◽  
Danila Moscone ◽  
Fabiana Arduini
Keyword(s):  
Drinking Water ◽  
Silver Ions
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