tender for purchase of chemicals , purchase of chemicals , kjedhal digestion apparatus - 6 test property- specification instrument type-kjedahl apparatus analytes -total nitrogen (n) test capacity- 6 tests measurement method- kjeldahl digestion method (chemical digestion) detection range - nitrogen: mg/g to % level accuracy-±1-2% (method dependent) response time- 1-2 hours per digestion cycle sample type-soil, plant tissue, organic matter power supply - 220-240 v ac, 50 hz heating system - electric digestion heater / mantle , teaching kit for plants fusion property- specification instrument type-demonstration kit analytes- carbon dioxide (co₂) fixation (conceptual) test capacity - group demonstration measurement method- visual/ model- based explanation response time - immediate sample type - lant models/ teaching aids 25exp kit