Validation of analysis of arsenic in water samples using Wagtech Digital Arsenator

Safarzadeh–Amiri, Ali; Fowlie, Peter; Kazi, AI; Siraj, Shajahan; Ahmed, Samina; Akbor, Ahedul

doi:10.1016/j.scitotenv.2011.03.016

Cited by 30 publications

(33 citation statements)

References 12 publications

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“…Percent underestimates relative to the WHO and Bangladesh As standards were 4% 21 and 5% 25 , and 4% and 1%, respectively; and overestimates were 1% and 2%, and 1% and 6%, respectively. The Wagtech digital arsenator has been used in two previous studies in Bangladesh 26; 27 . The proportions reported by Sankararakrishnan et al were slightly higher at 10% for underestimates (compared to 4% found in the present study) and 6% for overestimates (compared to 2%) 26 .…”

Section: Resultsmentioning

confidence: 99%

Evaluation of an Arsenic Test Kit for Rapid Well Screening in Bangladesh

George

Zheng²,

Graziano

et al. 2012

Environ. Sci. Technol.

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Exposure to arsenic in groundwater via drinking remains unabated for millions of villagers in Bangladesh. Since a blanket testing campaign using test kits almost a decade ago, millions of new wells have been installed but not tested, thus affordable testing is needed. The performance of the Arsenic Econo-Quick (EQ) kit was evaluated by blindly testing 123 wells in Bangladesh and comparing with laboratory measurements; 65 wells were tested twice. A subset of the same 123 wells was also tested using the Hach EZ kit in the field and the Digital Arsenator in the laboratory in Bangladesh. The EQ kit correctly determined the status of 110 (89%) and 113 (92%) out of 123 wells relative to the WHO guideline (10 μg/L) and the Bangladesh standard (50 μg/L), respectively. Relative to the WHO guideline, all misclassifications were underestimates for wells containing between >10 and 27 μg/L As. Relative to the Bangladesh As standard, over- and under-estimates were evenly distributed. Given its short reaction time of 10 min relative to the Hach EZ and its lower cost compared to the Arsenator, the EQ kit appears to have several advantages for well testing in Bangladesh and elsewhere.

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Section: Resultsmentioning

confidence: 99%

Evaluation of an Arsenic Test Kit for Rapid Well Screening in Bangladesh

George

Zheng²,

Graziano

et al. 2012

Environ. Sci. Technol.

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“…Arsenic concentration was determined according to the instructions of the Wag-WE10500 Wagtech Digital technique Arsenator ® (Erlanger, KY, USA) commercial portable kit, which has been validated by other studies (Kinniburgh and Kosmus, 2002;Safarzadeh-Amiri et al, 2011). The Arsenator ® was calibrated in triplicate before use with standard solutions containing 0, 10, 25, 50, and 75 µg/L As.…”

Section: Assessment Of Arsenic Exposurementioning

confidence: 99%

Detection of damage on single- or double-stranded DNA in a population exposed to arsenic in drinking water

et al. 2017

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ABSTRACT. Different studies have suggested an association between arsenic (As) exposure and damage to single-stranded DNA by reactive oxygen species derived from the biotransformation of arsenic. The single strand damages are converted to double strand damage upon interaction with ultraviolet radiation. Analysis of genomic integrity is important for assessing the genotoxicity caused by environmental pollutants. In this study, we compared the concentration of As in drinking water, nutritional status, lifestyle variables, and the level of genotoxicity in an exposed population and a control group. Arsenic content of water was determined using a portable Arsenator ® kit. DNA fragmentation was determined using the two-tailed comet assay. Our results show that 2 J. Jiménez-Villarreal et al.Genetics and Molecular Research 16 (2): gmr16029241 the exposed population had low nutritional consumption compared to the control group (P < 0.05). Furthermore, the water consumed by the exposed group had As concentration of 14.3 ± 8.4 mg/L, whereas the As level in the water consumed by the control group was 7.7 ± 3.5 mg/L. Analysis shows that the frequency of double strand break (DSB) fragmentation was higher in the population exposed to higher levels of As compared to that of the control group. These results suggest a possible association between the concentration of As in drinking water and lifestyle variables, with increasing fragmentation of DSBs in the exposed population.

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“…However, an estimation was made in this regard and the production of a series of 20 prototype devices and 100+ prefilled microfluidic cartridges indicated a 700 USD envisaged retail price for the equipment with around 1.5 USD/test cost. Compared to high-end portable devices on the market, such as the Wagtech Arsenator (Wagtech, 2016), with around 1800 USD retail price and 9 USD test cost (Safarzadeh-Amiri et. al, 2011), our concept would offer both a cheaper solution and much simpler operation.…”

Section: Introductionmentioning

confidence: 99%

A colorimetry based, semi-automated portable sensor device for the detection of arsenic in drinking water

Bonyár

Nagy

Mayer

et al. 2017

Sensors and Actuators B: Chemical

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A portable colorimetric device is presented for arsenic ion detection in drinking water. The main purpose of this device -which was developed to complement a commercial water dearsenating station demanding regular (weekly to monthly) regeneration runs depending on its saturation -is to provide regular field measurements and easy, semi-automatic operation designed specifically for untrained, typically illiterate users e.g. the population of developing countries. The device exploits a commercially available, well established reagent kit, which is widely used in arsenic field-testing in many developing countries. The hereby presented custom-designed microfluidic system enhances the user-friendliness, the functionality and reliability of the test-strip based kit. The response for total inorganic arsenic ion concentrations (As(III) and As(V)) is linear in the 5-20 μg/l (ppb) range with a sensitivity of 1 μg/l, thus the device is capable to distinguish drinkable water based on the World Health Organization (WHO) guidelines of 10 μg/l. The average relative standard deviation of the measurements is 8 % in the linear range and it is below 2 % for higher arsenic concentrations (above 20 μg/l). The hardware construction of the device and the custom microfluidic system is presented in detail. The effect of elevated water sample temperature on the kinetics and performance of the device was also investigated in order to reduce the required time for the measurements. Stable and reliable arsenic concentration values were obtained after 60 min at 22 o C (ambient temperature) and after only 25 min at 50 o C water sample temperature, but at a cost of an increased relative standard deviation to 16 %, in the linear range.

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Validation of analysis of arsenic in water samples using Wagtech Digital Arsenator

Cited by 30 publications

References 12 publications

Evaluation of an Arsenic Test Kit for Rapid Well Screening in Bangladesh

Evaluation of an Arsenic Test Kit for Rapid Well Screening in Bangladesh

Detection of damage on single- or double-stranded DNA in a population exposed to arsenic in drinking water

A colorimetry based, semi-automated portable sensor device for the detection of arsenic in drinking water

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