Abstract
A new resonance light scattering (RLS) probe for determining proteins is presented. The weak RLS of pyronine Y–SDS can be enhanced substantially by adding proteins in the presence of H2SO4, resulting in a strong and wide RLS band in the region 310–425 nm. The interaction of pyronine Y–SDS with proteins was studied on the basis of this behavior and a new quantitative method was developed for determining proteins. The enhanced RLS intensity is proportional to the concentration of proteins in the range 0.15–3.6 μg mL−1 for bovine serum albumin (BSA) and 0.06–4.8 μg mL−1 for human serum albumin (HSA), with detection limits of 21.0 and 12.0 ng mL−1, respectively. This method is characterized by high sensitivity, rapidity of reaction, and simplicity. Four synthetic samples were determined satisfactorily and recovery was 99.5–101.5%. Results for human serum and urine samples were in agreement with those obtained by the Bradford method, with relative standard deviations (RSD) of 1.5–3.1%.
Similar content being viewed by others
References
Rosebrough NJ, Farr AL, Randall RJ (1951) J Biol Chem 193:265
Bradford MM (1976) Anal Biochem 72:248
Zor T, Seliger Z (1996) Anal Biochem 236:302–308
Flores R (1978) Anal Biochem 88:605–611
Rodkey FL (1965) Clin Chem 11:478
Doumas BT, Watson WA, Biggs HG (1971) Anal Chim Acta 31:87
Ma CQ, Li KA, Tong SY (1998) Anal Lett 31:1021–1036
Mori I, Taguch K, Fujita Y, Matsuo T (1995) Anal Lett 28:225–237
Soedjak HS (1994) Anal Biochem 220:142–148
Fujita Y, Mori I, Matsuo T (1997) Anal Sci 13:513–516
Ma CQ, Li KA, Tong SY (1996) Anal Chim Acta 333:83–88
Jiang CQ, Luo L (2004) Anal Chim Acta 506:171–175
Huang CZ, Li KA, Tong SY (1996) Anal Chem 68:2259–2263
Jia RP, Dong LJ, Li QF, Chen XG, Hu ZD (2002) Talanta 57:693–700
Ma CQ, Li KA, Tong SY (1997) Fresen J Anal Chem 357:915–920
Ma CQ, Li KA, Tong SY (1996) Anal Biochem 239:86–91
Li QF, Chen XG, Zhang HY, Xue CX, Liu SH, Hu ZD (2000) Fresen J Anal Chem 368:715–719
Zhong H, Li N, Zhao FL, Li KA (2004) Talanta 62:37–42
Cong X, Guo HX, Wang XX, Shen HX (2001) Anal Chim Acta 444:205–210
Chen YJ, Yang JH, Wu X, Wu T, Luan YX (2002) Talanta 58:869–874
Feng SL, Tang A, Fan J (2001) Chin J Anal Chem 29:1315–1317
Feng SL, Tang A, Fan J (2001) Chin J Anal Chem 29:558–560
Feng SL, Tang JM, Fan J (2003) Spectrosc Spect Anal 23:322–324
Yao G, Li KA, Tong SY (1999) Talanta 50:585–594
Qi WB (1986) Surfactant and analytical chemistry. China Measurement Press, Beijing, 9:39
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Feng, S., Pan, Z. & Fan, J. Determination of trace proteins with pyronine Y and SDS by resonance light scattering. Anal Bioanal Chem 383, 255–260 (2005). https://doi.org/10.1007/s00216-005-3402-2
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00216-005-3402-2