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.
1 Patients will also need to pay for the insulin delivered via the device. 2  Cost for insulin varies widely depending upon the individual's dosage and brand. 3  The nonprofit group InsulinPumpers.org, reports that the average patient without insurance spends about $785 dollars a year on insulin. Some insurance plans will cover the cost of the pump. 2  Patients with insurance can expect typical copay and coinsurance rates ranging from $5 to half of the total cost of the pump. 3  Though most pumps will come with infusion lines, syringes and batteries, the patient will have to continually replace these items.