AIM To determine vitamin B 1 in pharmaceutical preparations by chemiluminescence (CL) flow sensor. METHODS When 200 μL of Na 3PO 4 was passed through an anion exchange column, K 3Fe(CN) 6 was eluted from the resin an...AIM To determine vitamin B 1 in pharmaceutical preparations by chemiluminescence (CL) flow sensor. METHODS When 200 μL of Na 3PO 4 was passed through an anion exchange column, K 3Fe(CN) 6 was eluted from the resin and then mixed with the vitamin B 1 stream containing NaOH to product CL, by the fast oxidation reaction between vitamin B 1 and K 3Fe(CN) 6 in alkaline solution. RESULTS The CL emission intensity was correlated with the vitamin B 1 concentration in the range 1 0×10 -5 to 1 0×10 -3 mol·L -1 and the detection limit was 8 0×10 -6 mol·L -1 (3σ). A complete analysis, including sampling and washing, can be performed within 2 min with a relative standard deviation of less than 4 0%. CONCLUSION The vitamin B 1 flow sensor was stable for over 200 analyses and has been applied successfully to determination of vitamin B 1 in pharmaceutical preparations.展开更多
文摘AIM To determine vitamin B 1 in pharmaceutical preparations by chemiluminescence (CL) flow sensor. METHODS When 200 μL of Na 3PO 4 was passed through an anion exchange column, K 3Fe(CN) 6 was eluted from the resin and then mixed with the vitamin B 1 stream containing NaOH to product CL, by the fast oxidation reaction between vitamin B 1 and K 3Fe(CN) 6 in alkaline solution. RESULTS The CL emission intensity was correlated with the vitamin B 1 concentration in the range 1 0×10 -5 to 1 0×10 -3 mol·L -1 and the detection limit was 8 0×10 -6 mol·L -1 (3σ). A complete analysis, including sampling and washing, can be performed within 2 min with a relative standard deviation of less than 4 0%. CONCLUSION The vitamin B 1 flow sensor was stable for over 200 analyses and has been applied successfully to determination of vitamin B 1 in pharmaceutical preparations.