1987
DOI: 10.1016/s0003-2670(00)84711-x
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Spectrophotometric field monitor for water quality parameters

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Cited by 101 publications
(29 citation statements)
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“…While field analysis equipment is available (e.g. Worsfold et al, 1987;Hanrahan et al, 2001), in situ analysis is not used widely owing to cost and high maintenance requirements. Hence, samples are generally returned to the laboratory for analysis.…”
Section: Storage Of Samples Prior To P Analysismentioning
confidence: 99%
“…While field analysis equipment is available (e.g. Worsfold et al, 1987;Hanrahan et al, 2001), in situ analysis is not used widely owing to cost and high maintenance requirements. Hence, samples are generally returned to the laboratory for analysis.…”
Section: Storage Of Samples Prior To P Analysismentioning
confidence: 99%
“…Using tin(II) chloride generates a product with a wavelength maximum at 690-700 nm as compared with 882 nm for ascorbic acid [2]. This allows greater sensitivity when a solid state detector (using a red light emitting diode light source) is used [9]. However, disadvantages include unstable colour development, a considerable salt error, temperature dependence and unsatisfactory performance at high phosphorus concentrations [10].…”
Section: Introductionmentioning
confidence: 99%
“…Hauser [14][15][16][17] has long advocated the advantages of using LEDs and was the first to report the use of a blue LED as a spectrophotometric source coupled with a photodiode as a detector. Photodiodes are one of the most commonly used detectors in optical sensors [15,[18][19][20][21]. Schmidt et.…”
Section: Introductionmentioning
confidence: 99%