ANALYTICAL CHEMISTRY, VOL. 54, NO. 3, MARCH 1982
(4) Robbins, W.; Caruso, J. A.; Fricke, F. L. Anawst (London) 1979, 104, 35-40. (5) Goulden, P. D.; Anthony, 0.H. J.; Austen, K. D. Anal. Chern. 1981, 53, 2027-2029. (6) Reamer, D. c.; veillon, C.. Paper No. 776, 31st Pittsburgh Conference on Analytical Chemistry and Applied SPectroscoPY, Atlantic Cib’, NJt March 1981. (7) Plckford, C. J. Andyst(London) 1981, 106, 464-466.
(8) Carter, D.; Warren, J., Laboratory of the Government Chemist, Internal Report No. 2, 1977.
RECEIVED for review June 16, 1981. Accepted December 3, 1981. This work wL,s partially funded by Contract ~ 1 ) 1271026, the Laboratory of the Government Chemist.
CORRECTIONS
Resolution of Overlapped Electrochemical Peaks with the Use of the Kalman Filter Teri F. Brown and Steven D. Brown (Anal. Chem. 1981, 53, 1410-1417). There is an error in Table I. The Kalman gain equation in the table should read
&(k) = P(klk
-
P ) - P ( k ) * [ S P ( k l -k 1).P+ R]-’
and R is defined as the measurement covariance matrix (M
x M).
In Table I1 of the same paper, the Kalman gain equation should read
K(k)= P(klk - Il)*sT.[SP*Sr +c
~
~
~
]
-
~
Peak Resolution by Semiderivative Voltammetry Jeffrey J. Toman and Steven D. Brown (Anal. Chem. 1981, 53, 1497-1504). There are unfortunate errors in eq 4 and 8 and in Table IV. Equation 4 should read
and eq 8 should read
nFm* e(E) = 4 R T sech2 [ % ( E
N
1
+ yz In icpi[xil =l
- E*~,J
The title to Table IV should read Fit Peak Parameters Dependence on Peak Widths for Synthetic sech2 Fused Peak Systems.
Chemical Ionization in Fourier Transform Mass Slpectrometry Sahba Ghaderi, P. S. Kulkarni, Edward B. Ledford, Jr., Charles Wilkins, and Michael L. Gross (Anal. Chem. 1981, 53, 428-437). There is an error on page 432, second paragraph. The pressure of CO was estimated to be 1 X torr based on analysis of the methane sample using a Kratos MS-50 double focusing mass spectrometer. Calculation of PCOusing the data in Figure 5, however, indicates that Pco should be about 1 X lo-? torr. The discrepancy is probably due to the formation of CO from methane and trace amounts of water in the ion pump. The same phenomenon manifests itself for the cyclo hexanone CI experiment discussed in the fourth paragraph, page 432. The fast consumption of CH6+was partially due to protonation of CO. The CHO’ (unresolved from CzH6+) contributed to the mlz 29 peak intensity reported in Table
IV.
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