urine from normotensive volunteers and patients with systemic lupus erythematosus glomerulonephropathy was sequentially concentrated by negative-pressure ultrafiltration , dialyzed against distilled water , and extracted into the chloroform phase of a mixture of organic solvents ( chloroform : methanol : water , 1:1:0.9 vol/vol ) .
C0790233
distilled water
C0043047
water