Clinical Chemistry, Vol 30, 1368-1368, Copyright © 1984 by the American Association for Clinical Chemistry

Use of Alumina, SephadexGlO, and Ion-ExchangeColumnsto Purify Samplesfor Determination of Epinephrine,Norepinephrine,Dopamine, HomovanillicAcid, and 5-Hydroxyindoleacetic Acid in Urine

¹ Pharmaceutical Laboratories, Department of Medicinal Chemistry, University of Groningen, A. Deusinglaan 2, 9713 AW, Groningen, The Netherlands
² Traffic Research Center, University of Groningen, A. Deusinglaan 2, 9713 AW, Groningen, The Netherlands

Vol. 28

p 1746: In line 10 of column one, "700 mL/L" refers to concentrated perchloric acid, which contains 700 g of the acid per liter.

p 292, column two:

equation 1 should read:

[See equation in the PDF file]

The second part of equation 5 should read "s_T = 1.66" (not "166"). Equation 6 should read s_RA = [s²_BR + s²_PWR/N_k]^1/2;and the equation at the bottom of the column should read s_RA < [s²_BR + s²_PWR]^1/2;. In the sentence just preceding section 3, change "s²_WR" to "s²_PWR."

p 299: "Corning," three lines from the bottom of column one, should read "Hoechst."

p 428: In Table 1, at the top of the third column: for "3.06" substitute "3.07" and for "3.94" substitute "4.12."

p 501: Column three, line 19: "...suggests that the thyroxin..." should read "...suggests that the immunogen..."

p 521: In this paper (e.g., Figure 3) the ratios reported are by weight. To express them on a molar basis, multiply by 1.10.

p 584: Units for calcium and phosphate should be "µmol/L" not "mmol/L."

p 758: In the equation near the bottom of column one, delete the bar over the x.

p 780: Four lines were omitted from the top of column 1: both comparing well with those of the Amersham analog-based assay for FT₄ (7). The reference interval, 10-23 ng/L, clearly differentiated untreated hyper- and hypothyroid from euthyroid patients, only six of 74 results for euthyroid.