The present invention discloses a cost effective and easy to use kit for detection of arsenate (As(V)) in ppb level in drinking water. The kit comprising of dipstick colorimetric sensor made of plastic detector strips which are coated with coloring reagent-polymer hydrogel coating. The said plastic detector strip coated with the reagent polymer coating when dipped into 20 ml of arsenic contaminated water in presence of an organic acid, it turned into blue color within a short time. The resulting blue color intensity in the detector strip indicates the level of arsenate (As(V)) contaminant in drinking water. The present invention is also directed to use of the present kit in preventing harmful effects in human caused from drinking arsenic contaminated water.
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