Спектры поглощения смесей бензола и изооктана в области 1620-1820 нм

Citation preview

. 75, № 5 V. 75, N 5

2008 SEPTEMBER — OCTOBER 2008 —

JOURNAL OF APPLIED SPECTROSCOPY

Ы . .

Щ 1620—1820 *

, . .

У К 535.34:(62-631.2+62-631.3) У 432011, У

,

И .

АН, , 48; e-mail: [email protected]

(

3

2008)

щ 1620—1820 .

= 1671.5 ± 0.5

Н, Н2, Н3. У щ

λ ≈ 1695

,

,

,

(0—100 %). Ключевые слова: щ Н, Н2, Н3.

щ . щ

λ = 1671.5

,

,

-

,

,

щ .

щ

,

λ =

,

-

-

The experimental absorption spectra of benzole, isooctane, and their mixtures are obtained in the wavelength range λ = 1620—1820 nm, in which the first overtones of vibrational frequencies of Н, CH2, CH3 hydrocarbon groups are arranged. The positions of basic absorption bands of benzole are refined. All absorption spectra of benzole–isooctane mixtures are shown to intersect in a narrow area near λ ≈ 1695 nm. To determine the content of benzole in benzole–isooctane mixture, it is proposed to select the main maximum of its absorption at λ = 1671.5 ± 0.5 nm, where the influence of isooctane absorption spectrum is practically absent. The linear calibration curve for λ = 1671.5 nm encompassing a full range of benzole concentrations (0—100 %) is offered. Keywords: absorption spectrum, benzole, isooctane, mixtures of hydrocarbons, Н, Н2, Н3 hydrocarbon groups. . ( λ = 1600—1800 , CH3, CH2, CH, [2, 4, 5], . , 1680 ( 1685 )

( = ), ,

), [1, 2].

-

[3]. -

[6, 7].

-

λ = 1620—1820

ABSORPTION SPECTRA OF BENZOLE—ISOOCTANE MIXTURES IN THE WAVELENGTH RANGE 1620—1820 nm V. L. Vesnin and V. G. Muradov * (Ulyanovsk Branch of the Institute of Radioengineering and Electronics, Russian Academy of Sciences, 48 Goncharov Str., Ulyanovsk, 432011, Russia; e-mail: [email protected])

. .,

632

,

. .

,

, ( Э = 1620—1820

-

)

.

λ = , ), -

х.

-41,

[8]. ,

(

: ; ,

, 0.3

-

( Ц ),

;

. 750 0.2

.

,

/ d = 1.07

/

.

, 2, 4, 8, 10, 30, 60 99.8 %.

( . .)

90

. %.

99.9 %, ,

. .

(0.11965

/ ).

λ = 1650—1720

— 230

: Ц

16-

(1.2257

/ ) 20

λ = 1620—1820

,

;

. -

350

. , 1.2257

/ 3

. (

-

-

0.1 ) “

” ,

.

1620—1820 .

-

kλ

,

λ.

(

).

kλ = f(λ) .1

. . , 1722 (1724), 1740 (1740), 1771 (1773)

. 1,

,

( ,

3,

—

2-

). [2].

.

.

1650—1720 1620—1650 , . λ > 1720

, -

λ = 1695 (1696), 1705 (1706), [5] 8—16 . , , ,

.

Щ

k, 30

633

–1

6

6

30

a

25

25

20

5

4

5 4

20

15

15 3

3 10

10

1 2

5

3 4 6 5 1700

2 1

0

1650

1750

. 1.

1670

(1), ( )

( ) 10 (2), 30 (3), 60 (4)

90

(

(6)

6—8 , )

B

kM = 0.11 + 0.29

(%)

(

. -

. 2, ). (1)

λ = 1692

1687

.

λ = 1722 ,

I

.

. 2,

kM = 0.26 + 0.061 I, R = 0.9994.

λ = 1719

.

B,

R = 0.9993. . 1, , , λ = 1719

(2—5)

λ = 1660, 1667, 1671.5, 1676.5, 1681 λ = 1671.5 ± 0.5 ,

,

–1

λ,

1710

λ = 1671.5 . , λ = 1687 1692 , λ = 1701.0 1705.5 )

-

λ = 1671.5

1690

. % (5)

.

kM (

6

1

0 1650

1800

1 2 3 4 5

2

5

(2)

. ,

kM = (kB – kI)

kB . .

kI — ; (3)

+ kI,

B

(3) ,

B— ,

(

0

kB = kI = kM λ ≈ 1694.8

1). , -

B.

.

. .,

634

–1

k, 30

. .

–1

k, 6

20

4

10

2

0

20

40

60

80

0

,%

. 2. ( )

40

60

80

λ = 1695 .

≈1 10

100

I,

%

λ = 1671.5 ( )

λ = 1719

,

юч

20

, ,

. 1, -

100 %.

. B

λ = 1671.5

, kM

0

100 %.

,

B.

[1] . . , . . . . . ., 74, № 2 (2007) 157—161 [2] J.J.Kelley, J.B.Callis. Anal. Chem., 62 (1990) 1444—1451 [3] L.G.Weyer. Appl. Spectr. Rev., 21 (1985) 1—43 [4] K.B.Whetsel. Appl. Spectr. Rev., 2 (1968) 1—68 [5] C.Tosi, A.Pinto. Spectrochim. Acta, 28A (1972) 585—597 [6] O.H.Wheeler. Chem. Rev., 59 (1959) 629—666 [7] D.L.Pewell, E.J.Derland, T.R.Williams. Anal. Lett., 4 (1971) 479—483 [8] . . , . . . . . . , 10 (2008) 724—731

. -