A simple inexpensive gas phase chemiluminescence analyzer for measuring trace levels of arsenic in drinking water.
An inexpensive sensitive gas-phase chemiluminescence (GPCL) based analyzer for arsenic is described; this device utilizes manual fluid dispensing operations to reduce size, weight and cost. The analyzer in its present form has a limit of detection (LOD, S/N = 3) of 1.0 microg/L total inorganic As (peak heightbased, 3 mL sample). The system was used to measure low level arsenic in tap water samples from Texas and New Mexico and compared with results obtained by inductively coupled plasma-mass spectrometry (ICP-MS) as well as those from an automated GPCL analyzer. Good correlations were observed. Higher levels of As (50-500 microg/L, As(III), As(V) and mixtures thereof) were spiked into local tap water; the recoveries ranged from 95 +/- 2% to 101 +/- 1%. A single instrument weighs less than 3 kg, consumes <25 W in power, can be incorporated in a briefcase and constructed for <$US $1000. It is easily usable in the field.
Sengupta
Mrinal K
MK
Department of Chemistry and Biochemistry, University of Texas at Arlington, 700 Planetarium Place, Arlington, TX 76019-0065, USA.
Hossain
Zafreen A
ZA
Ohira
Shin-Ichi
S
Dasgupta
Purnendu K
PK
D001151:Arsenic / Q000032:analysis*; D002712:Chlorides / Q000032:analysis; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D002712:Chlorides; D014874:Water Pollutants, Chemical; D001151:Arsenic