scholarly journals Verification of spectrophotometric method for nitrate analysis in water samples

2017 ◽  
Author(s):  
Puji Kurniawati ◽  
Reny Gusrianti ◽  
Bledug Bernanti Dwisiwi ◽  
Tri Esti Purbaningtias ◽  
Bayu Wiyantoko
Keyword(s):  
Spectrophotometric Method ◽  
Water Samples ◽  
Nitrate Analysis

scholarly journals A SIMPLE SPECTROPHOTOMETRIC METHOD FOR THE QUANTITATIVE ANALYSIS OF PHOSPHATE IN THE WATER SAMPLES

2018 ◽  
Vol 7 (2) ◽  
pp. 198
Author(s):  
Nur Habibah ◽  
I Gusti Ayu Shri Dhyanaputri ◽  
I Wayan Karta ◽  
Cokorda Dewi Widhya Hana Sundari ◽  
Mochammad Choirul Hadi
Keyword(s):  
Quantitative Analysis ◽  
Spectrophotometric Method ◽  
Water Samples ◽  
Calibration Graph ◽  
Ammonium Molybdate ◽  
Official Method ◽  
Phosphate Content ◽  
Color Intensity ◽  
Molybdenum Blue ◽  
Sulfuric Acid Medium

A simple spectrophotometric method was used to determine the phosphate content in the water sampels. The method is based on the formation of molybdenum blue complex from the reaction of orthophosphate and ammonium molybdate followed by reduction with ascorbic acid in the aqueous sulfuric acid medium. The color intensity of the molybdenum blue complex is proportionally to the phosphate content in the solution. The system obeys Lamber-Beer’s Law at the 890 nm in the concentration range of 0.1-1 mg P/L and the linier calibration graph was obtained with the slope, 0.6334, intercept, 0.0074 and correlation coefficient of 0.9988. This official method was also used for the quantitative analysis of phosphate in the water samples and the satisfactory result was obtained. The range of phosphate concentration in the water samples are 0.033 – 2.943 mg P/L.

Unbiased spectrophotometric method for estimating phenol or o-cresol in unknown water samples

2003 ◽  
Vol 376 (3) ◽  
pp. 413-421 ◽  
Author(s):  
L. A. Tortajada-Genaro ◽  
P. Campíns-Falcó ◽  
F. Bosch-Reig
Keyword(s):  
Spectrophotometric Method ◽  
Water Samples

A Sensitive Hydride Generation-Nanogold Spectrophotometric Method for Trace As(III)

2013 ◽  
Vol 749 ◽  
pp. 495-498
Author(s):  
Yang He Luo ◽  
Mei Ling Tang ◽  
Gui Qing Wen ◽  
Wen Qing Yin ◽  
Zhi Liang Jiang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Spectrophotometric Method ◽  
Water Samples ◽  
Hydride Generation ◽  
Gum Arabic

In H2SO4 solution, the arsenic was reduced to arsine (AsH3) by NaBH4, and absorbed by solution of H3PO4-HAuCl4-NH4SCN-gum arabic. The Au3+ was reduced to nanogold, which led to the absorption value at 555nm increased. Under the selected conditions, the value was linear to the concentration of As (III) in the range of 0.07-1.10 μg/mL, a detection limit of 0.03 μg/mL. The proposed method was applied to detect As (III) in water samples, with satisfactory results.

scholarly journals Determination of NH4+in Environmental Water with Interfering Substances Using the Modified Nessler Method

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Heonsang Jeong ◽  
Jongtaek Park ◽  
Hyunook Kim
Keyword(s):  
Polyvinyl Alcohol ◽  
Spectrophotometric Method ◽  
Water Samples ◽  
Essential Element ◽  
Environmental Water ◽  
High Concentration ◽  
Modified Method ◽  
Dispersing Agent ◽  
Treatment Facilities

Nitrogen is an essential element in the environment. If excess nitrogen includingNH4 +is present in water, however, it can result in algae blooming and eventually the destruction of the aquatic ecosystem. Therefore, the determination ofNH4 +in streams, lakes, and effluents of the treatment facilities has long been carried out. The Nessler method is the most common spectrophotometric method to measureNH4 +in water. However, the result of the method becomes inaccurate if there are interfering substances such as Cl2, Cl−, hardness-causing compounds (e.g., Mg2+), and Fe2+in target water samples. In this study, therefore, the traditional Nessler method has been modified to eliminate the effects of interfering substances; the so-called MS was added to water samples. In addition, the polyvinyl alcohol reagent as a dispersing agent was added to water samples to increase the sensitivity and reproducibility of the method. The modified method could successfully analyzeNH4 +of water samples even with the interfering substance at high concentration.

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