Previous Page

Next Page

Table 4. Analysis conditions for determinations of vinyl acetate in polyethylene copolymers and ash in coal. Standard errors of prediction (SEP) are given for cross-correlations of the standards set.

Condition

Vinyl Acetate

Ash

number of scans

128

64

OPD mirror velocity (cm/s)

0.10

0.05

resolution (cm-1)

8

8

number of standards

13

11

concentration range

8.81 - 51%

6.0 - 31.6%

type of standards

pellets of different sizes

-200 mesh powder

method of analyzing

titration

ASTM ash analysis

standards

type of factor analysis

PLS

PCR

spectral ranges of factor

578-1596 cm-1

720-1818 cm-1

analysis

1630-1900 cm-1

2479-3150 cm-1

spectrum standardization

area of CH band

none

2750-3120

number of data sets

3

1

averaged

SEP

0.55% (mass)

0.44% (mass)

Home