Anal. Chem. 2008, 80, 7179
Correction Hygroscopic Behavior of Substrate-Deposited Particles Studied by Micro-FT-IR Spectroscopy and Complementary Methods of Particle Analysis Yong Liu, Zhiwei Yang, Yury Desyaterik, Paul L. Gassman, Hai Wang, and Alexander Laskin* (Anal. Chem. 2008, 80, 633–642)
Table 1 on page 639 presents polynomial coefficients for calculations of water-to-solute ratios (WSR) as a function of water activity aw for NaCl, sea salt, NaNO3, and (NH4)2SO4 salts. These coefficients were derived from literature data. However, because of rounding errors, their use for WSR calculations yields results that deviate from the literature data. The corrected table is given below which includes polynomial coefficients with two additional significant figures which are sufficient for accurate calculations. The corrected table also identifies the valid aw ranges of polynomial curve fitting. Table 1. Coefficients for Calculations of WSR as a Function of Water Activity aw for Solutes Used in That Worka
NaCl sea salt NaNO3 (NH4)2SO4 a
a0 × 10-2
a1 × 10-3
a2 × 10-4
a3 × 10-4
a4 × 10-4
a5 × 10-3
valid aw range
-7.57272 -4.37581 -4.73020 -0.571446
5.89057 3.59087 4.01209 0.576982
-1.81840 -1.16323 -1.3374 -0.222071
2.79765 1.87352 2.19929 0.424012
-2.14301 -1.49807 -1.78486 -0.397653
6.55270 4.77283 5.73707 1.48210
0.50-0.90 0.45-0.90 0.40-0.90 0.30-0.90
original references Tang Tang Tang Tang
et al.1 et al.1 and Fung2 and Munkelwitz3
WSR ) ∑i5) 0 aiaiw.
This correction does not affect the results and conclusions reported in the manuscript. ACKNOWLEDGMENT The authors are most grateful to Prof. Alexei V. Tivanski of the University of Iowa for pointing out the problem. (1) Tang, I. N.; Tridico, A. C.; Fung, K. H. J. Geophys. Res. [Atmos.] 1997, 102, 23269–23275. (2) Tang, I. N.; Fung, K. H. J. Chem. Phys. 1997, 106, 1653–1660. (3) Tang, I. N.; Munkelwitz, H. R. J. Geophys. Res. [Atmos.] 1994, 99, 18801–18808.
AC801397Q 10.1021/ac801397q Published on Web 07/30/2008
Self-Sealed Vertical Polymeric NanoporousJunctions for High-Throughput Nanofluidic Applications S. J. Kim and J. Han* (Anal. Chem. 2008, 80, 3507–3511)
The page number for ref 4 should be 044501.1-4, not 045501.1-4. AC801667Z 10.1021/ac801667z Published on Web 08/14/2008
Analytical Chemistry, Vol. 80, No. 18, September 15, 2008
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