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i <br /> f <br /> + Materials needed for la oon'wrater nitrogen avick test (,3/01 <br /> ` 420 nm hand-held generic pocket colorimeter (Hach 46777-42) $340.00 <br /> nate: The DR890 model colorimeter reads to three decimal places (generic reads to two), is <br /> somewhat more accurate in estimating organic-N, is less affected by hot temperatures, has a <br /> built in timer and can be useful for many different testing procedures. It costs about$899 <br /> 50 cc syringe, 300 gram analytical balance (to 1/10 gram), or really good eyesight for filling <br /> dilution bottles (below) with exactly 200 ml deienized or distilled water <br /> 250 ml (8 oz) cylindrical plastic bottle with dispensing flip-top dropper lid <br /> (Fisher Scientific phone 800-766-7000 part num. 02-926-1 $61.67 case of 24 or ' <br /> Consolidated Plastics phone 800-362-1000 order bottles & dropper lids separately: bottles <br /> 41688LL $8,40 per dozen, 24 ml flip top cap 41241LL $2.64 per dozen <br /> Distilled or deienized water. If dilution bottles are filled ahead of time, 'additional water will be <br /> needed for the test that was drawn at the same time, from the same source, and has been <br /> stored and handled the same as the water in the dilution bottle. This is because even <br /> distilled/deienized water can contain ammonium, which dissipates during storage. The reagent <br /> blank will account for this only if the reagent blank and sample water are identical. <br /> '1000 ml wash bottle (Hach 620-16) $6,25 <br /> '2 <br /> � t clean and dry 10mL size sample <br /> cells, 1 inch pakhlength. (Hach 24276-06) $15.50 set of 6 <br /> 1 ml plastic syringe (without a needle) Long's pharmacy in Ceres, $0.50 or ask your vet <br /> 'Mineral stabilizing agent (Hach 23766-26) $7.05 <br /> 'Dispersing agent (Hach 23765-26) $6.10 <br /> `Nessler reagent (Hach 21194-32) $12.75/bottle <br /> x <br /> lagoon water in a capped container <br /> Y (optional) rack for sample cells, holds 24 25mm vials (Hach 24979-03) $14,00 each <br /> (optional) calculator <br /> timer (2 minutes) <br /> f (optional) hand held portable scale <br /> Ohaus SC-4010 400g capacity, 0.1 gm readability, 50-104°F operating temp <br /> $139.95 .or Ohaus HP-320 320 g capacity, 0.2 gni accuracy, 64-77°F operating temp <br /> t $124,95 www.itinscales.com phone (718) 336-5900 <br /> 'order from HACH 1-800-227-4224 <br /> � 1 <br /> UCCE Stanisidus County 3/22/01 <br /> i1 . <br />