Raman Characteristic Peak Intensity Correction of Potassium Sorbate Based on Sodium Nitrate Internal Standard

$Raman spectra of sodium nitrate standard plasmid, potassium sorbate standard plasmid, and solution sample consisted of sodium nitrate with mass fraction of 0.1 and potassium sorbate with mass fraction of 0.1$

Fig. 1. Raman spectra of sodium nitrate standard plasmid, potassium sorbate standard plasmid, and solution sample consisted of sodium nitrate with mass fraction of 0.1 and potassium sorbate with mass fraction of 0.1

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$Raman spectra of solution sample consisted of sodium nitrate with mass fraction of 0.1 and potassium sorbate with mass fraction of 0.1$

Fig. 2. Raman spectra of solution sample consisted of sodium nitrate with mass fraction of 0.1 and potassium sorbate with mass fraction of 0.1

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$Original Raman spectra of 49 solution samples and Raman spectra of sodium nitrate sample with mass fraction of 0.1$

Fig. 3. Original Raman spectra of 49 solution samples and Raman spectra of sodium nitrate sample with mass fraction of 0.1

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Fig. 4. Raman spectra of 49 solution samples after correction

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Fig. 5. Prediction results of (a) calibration set and (b) validation set in potassium sorbate optimum prediction model

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Fig. 6. Prediction result of optimum prediction model of potassium sorbate in 18 validated samples

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Table 1. Characteristic peak intensity of potassium sorbate before and after correction under different conditions in the same sample

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Table 1. Characteristic peak intensity of potassium sorbate before and after correction under different conditions in the same sample

Test height /mm	Running time /h	Characteristic peak intensity of sodium nitrate(1053 cm^-1)	Relative change ratio	Characteristic peak intensity (1164 cm^-1)		Characteristic peak intensity (1399 cm^-1)		Characteristic peak intensity (1655 cm^-1)
Test height /mm	Running time /h	Characteristic peak intensity of sodium nitrate(1053 cm^-1)	Relative change ratio	Before correction	After correction	Before correction	After correction	Before correction	After correction
7.5	0	1749	1.00	2124	2124	1561	1561	5071	5071
7.5+2.0	0	1583	1.10	1895	2093	1381	1525	4506	4976
7.5+4.0	0	1137	1.54	1433	2203	1010	1552	3314	5096
7.5+4.0	2	585	2.99	774	2313	515	1537	1741	5200
7.5+4.0	4	404	4.33	502	2172	376	1627	1170	5065
RSD /%				46.99	4.49	48.25	2.27	48.07	1.43

Table 2. Comparison of linear regression prediction models of potassium sorbate standard solution

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Table 2. Comparison of linear regression prediction models of potassium sorbate standard solution

Data source	Raman shift /cm^-1	Linear equation	$\begin{matrix} R_{c}^{2} \end{matrix}$	RMS $\begin{matrix} {E_{c}}_{} \end{matrix}$ /10^-3	$\begin{matrix} R_{p}^{2} \end{matrix}$	RMS $\begin{matrix} {E_{p}}_{} \end{matrix}$ /10^-3	RSD /%	RPD
Raw data	1164	y=15.9692+0.0498x	0.5596	18.8914	0.4387	21.0420	38.97	1.31
	1399	y=16.3954+0.0693x	0.5981	18.0474	0.4481	20.8784	38.66	1.32
	1655	y=17.3176+0.0197x	0.5169	18.3457	0.4191	21.3249	39.49	1.30
Corrected raw data	1164	y=-1.5791+0.0489x	0.9860	3.3538	0.9749	4.8439	9.66	5.76
	1399	y=-0.9005+0.0671x	0.9885	3.0384	0.9865	3.7643	7.50	7.41
	1655	y=-0.1835+0.0204x	0.9844	3.5449	0.9784	4.3566	8.68	6.40

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Xiaoqian Fang, Yongyu Li, Yankun Peng, Yan Li, Fan Wang, Wenxiu Wang. Raman Characteristic Peak Intensity Correction of Potassium Sorbate Based on Sodium Nitrate Internal Standard[J]. Acta Optica Sinica, 2018, 38(4): 0430003

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Paper Information

Category: Spectroscopy

Received: Oct. 30, 2017

Accepted: --

Published Online: Jul. 10, 2018

The Author Email: Yongyu Li (yyli@cau.edu.cn)

DOI:10.3788/AOS201838.0430003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology