Tender For supply, installation, commissioning of and validation of a compact, audit-grade total kjeldahl nitrogen (tkn) analysis system for solids/sludge/soil/fertilizer matrices at 6.000 mg/kg range (0.6% n), including digestion, steam-distillation, autotitration, data management, safety scrubber, accessories, consumables, iq/oq/pq, training, and comprehensive warranty and annual maintenance contract in india