Portable double-beam, fiber-optic-based photometric comparator

Development of a photometric system for continuous flow analysis

“…While modern research and service-oriented laboratories of industrialized nations increasingly use sophisticated instruments, there is a growing need for compact, inexpensive and portable instruments that can perform determinations in regions far from the convenience of a modern laboratory [1]. Recent advances in low-cost, miniaturized detection technology [2][3][4] have made it possible to take traditional laboratory-based instrumental techniques, e.g.…”

Single optical fiber, position-sensitive detector-based multiwavelength absorbance spectrophotometer

“…Remote absorbance measurements are also of interest, where fiber optics are utilized (5)(6)(7)(8)(9)(10)(11)(12)(13). Remote absorbance sensing is important in process analysis (5, 7, 9, 12, 13), in bioanalytical monitoring (6), and in field-portable or applied instruments (11).…”

“…Remote absorbance measurements are also of interest, where fiber optics are utilized (5)(6)(7)(8)(9)(10)(11)(12)(13). Remote absorbance sensing is important in process analysis (5, 7, 9, 12, 13), in bioanalytical monitoring (6), and in field-portable or applied instruments (11). In each case, the fiber optic arrangement provides a means to successfully analyze an otherwise difficult 0003-2700/90/0362-0558502.50/0 sample environment.…”