A good rule of thumb is: 1  for difficult separations (Î´CV â¤ 1) use up to 100 g (~200 mL) of silica gel per gram of compound to be purified (1% load) 2  for normal separations (1 â¤ Î´CV â¤ 5) use from 20 to 90 g (~40-180 mL) of silica gel per gram of compound to be purified (2-9% load)
Typical costs: 1  According to the Academy of Managed Care Pharmacy , insulin pumps cost between $4,500 and $6,500 for individuals without insurance. The price varies depending upon the features, brand and size of the pump. 2  Some insurance plans will cover the cost of the pump.
These prices for the heat pump alone and for heat pump split system packages. These heat pump prices will allow you to compare them with other models you are considering. 3 ton American Standard Gold XI Heritage 15 heat pump: $2,399.3 ton American Standard Gold XI Heritage 15 heat pump w/ air handler: $3,929. 4 ton American Standard Gold XI Heritage 15 heat pump: $2,799. 4 ton American Standard Gold XI Heritage 15 heat pump w/ air handler: $4,699.hese prices for the heat pump alone and for heat pump split system packages. These heat pump prices will allow you to compare them with other models you are considering. 3 ton American Standard Gold XI Heritage 15 heat pump: $2,399.