N

Nails, specimen drug testing, 24 Nitrites, adulteration of urine specimens, 223, 224

detection in specimens, 227 Nitrocellulose membranes, advantages in lateral-flow assays, 85 blocking agents, 83, 84 capture reagent lines, capillary flow time effects, 81 chemical interaction effects, 81, 82

function, 79, 80 reagent application, 80 characterization, capillary flow time, 76 overview, 75, 76 surface quality, 77 thickness, 76, 77 historical perspective, 71, 72 manufacture, backing, 74, 75, 101, 102

casting, 74

nitrocellulose lacquers, 73, 74 nitrocellulose polymer, 73 protein-binding properties, adsorption and retention, 78 capacity, 78 orientation, 78 reactivity, 79 signal development in lateral-flow assays, liquid flow uniformity, 82, 83 sensitivity, 83 test strip design, 72, 73, 88, 99, 100

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