Screening of caffeine, preservatives and antioxidants in dairy products available in Bangladesh using an RP-HPLC method

Table 7 Precision of the proposed method

Standards	Spike level^a (%)	Intra–day (Mean ± %RSD)^b	Inter–day (Mean ± %RSD)^b
CF	100	1865839 ± 0.71	1855736 ± 0.63
BA	100	986908 ± 0.50	982929 ± 0.56
PP	100	994208 ± 0.35	985310 ± 0.46
BP	100	858343 ± 0.43	852766 ± 0.76
BHA	100	216226 ± 0.80	213500 ± 0.86
BHT	100	234037 ± 0.94	214671 ± 0.69

CF caffeine, BA benzoic acid, PP propylparaben, BP butylparaben, BHA butylated hydroxyanisole, BHT butylated hydroxytoluene
^aSpike level indicates the corresponding nominal concentration of each standard
^bAll determinants are in sextuplicate

ISSN: 2731-9245