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Table 4 Precision (Intermediate assay and Intra-day) validation for dieckol in phlorotannin preparations

From: Method development and validation for dieckol in the standardization of phlorotannin preparations

  Concentration (μg/mL) Instruments Dieckol content (mg/g) Average content (mg/g) SD (mg/g) RSD (%)
Itermediate assay 94.56231 Agilent 1260 73.930 74.453 0.920 1.236
  97.25632 Agilent 1260 75.057
  93.42563 Agilent 1260 73.044
  98.62358 Agilent 1200 75.384
  Phlorotannin sample (mg) Concentration (μg/mL) Dieckol content (mg/g) Average content (mg/g) SD (mg/g) RSD (%)
Intra-day: Agilent 1260 Infinitya 56.5 96.10084 74.1592 73.9297 0.761 1.030
  59.4 101.08464 74.1968
  58.3 97.25135 72.7300
  56.6 95.55534 73.6080
  57.9 99.64617 75.0358
  52.7 89.26187 73.8485
  1. SD standard deviation, RSD relative standard deviation
  2. aValues were calculated using intra-day analyses (n = 6)