1, Fig. 2, Fig. 3 and Fig. 4. For the selectivity blank

samples matrix (n = 20) was injected, at retention times of analytes no interference peaks were found. Linearity was studied by using spiked blank extracts at five concentration levels (from 20 to 500 ng/g) and statistically compared by using linear regression NVP-AUY922 cost model. The linear through zero regression (1/x weighting) for TC: y = 1e + 004x (r = 0.9984); OTC: y = 1.03e + 004x (r = 0.9961); CTC: y = 4.91e + 003x (r = 0.9987) and DOC: y = 1.34e + 004x (r = 0.9981) respectively. The LOD and LOQ values were determined based on the signal to noise ratio of 3:1 and 10:1 respectively. The LOD and LOQ of antibiotics were found to be TC: 11 and 19 ng/g, OTC: 12 and 20 ng/g, CTC: 12 and 20 ng/g and DOX: 13 and 20 ng/g respectively. Recoveries were determined by using spiked samples at 50, 100 and 150 ng/g concentration levels. The results of average % recoveries are given in Table 3 Precision was studied

by performing repeatability and intermediate Selleckchem Alisertib precision. Repeatability and intermediate precision were evaluated with same analytical procedures at inter and intra day by using spiked samples (n = 3) at three concentration levels 50, 100 and 150 ng/g and the results were expressed in relative standard deviation. Precision results are shown in Table 4. Results of repeatability were in the range 2.1–9.8%. Results (Table 2) show that tetracycline antibiotics (TC, OTC, CTC, and DOX) were not found in samples 1 and 4. In samples 2 and 3 OTC were detected but it is below the maximum residual limit (MRL) given by 2002/657/EC Decision. In general a small population

of prawns might be exposed to antibiotics; the source of contamination may be human waste,16 animal waste,17 and domestic animals.18 A simple LC–MS/MS method for estimation of tetracycline antibiotics in prawns (P. monodon) was developed and validated. The validation parameters such as linearity, recovery and precision were found to be good. The antibiotic resistance may occur when antibiotics are exposed to any environment. 19 By this study we can check food safety and antibiotic resistance. All authors have until none to declare. “
“Medicinal plants have been used since thousands of years from the beginning of human civilization for its therapeutic properties, containing inherent active ingredients that has properties to heal sores, relieve pain, cure diseases1 and maintenance of overall good health.2 Medicinal properties of plants provide ample opportunity for development and obtaining a wide variety of drugs. Therefore should be investigated further to better understand their safety and efficacy (Fig. 1, Fig. 2, Fig. 3 and Fig. 4).3 The property of herbal medicine is highly dependent upon the composition of chemical phytoconstituents in their extracted final product.