tender for supply of essential chemicals/crm for water testing laboratories of kashmir phe jal shakti department srinagar-01 colour 500 hupt -co std iso 17034 rpm solution nist traceable 02 ph ph buffer solution nist traceable ph 4.00 iso 17034 rpm crm 03 ph buffer solution nist traceable ph 7.00 iso 17034 rpm crm 04 ph buffer solution nist traceable ph 10.00 iso 17034 rpm crm 05 tds tds/conductivity meter calibration standard nist traceable iso 17034 rmp crm 06 turbidity turbidity meter calibration standard 1000 ntu nist traceable iso 17034 rmp crm 07 total alkalinity sodium carbonate nist traceable iso 17034 rmp crm 08 chlorides sodium chloride nist traceable iso 17034 rmp crm 09 total hardness and calcium (ca) calcium carbonate nist traceable iso 17034 rmp crm