The reagent 2-hydroxy naphthaldehyde was used for the spectrophotometric and reversed phase HPLC separation and determination of glycine, lysine, octopamine, serotonin and tyramine. The derivatives formed were examined spectrophotomatrically for the effects of pH, derivatizing reagent concentration and heating time in aqueous-methanolic solution. The derivatives indicated molar absorpitivity of 2.8 × 103-7.7 × 103 L mol-1 cm-1. The spectrophotometric calibration curves were observed within 1.0-20.0 μg mL-1 at lmax 420 nm. The derivatives of 2-hydroxy naphthaldehyde were easily eluted and separated from Kromasil 100 C-18 10 μm (25 cm × 0.46 cm id) column. The elution was carried out with methanol: water: acetonitrile and acetate buffer (0.1 M) (pH 6) (47:25:18:10 v/v/v/v) with a flow rate of 1 mL min-1 and UV detection was at 240 nm. A number of amino acids and pharmaceutical additives were checked and did not interfere to the determination. The method was successfully applied for the determination of lysine from pharmaceutical preparation and serotonin and glycine from human cerebrospinal fluid. The analysis was further supported by standard addition method. The recovery of lysine from pharmaceutical preparation was 97.46 % with RSD 2.8 %. Glycine and serotonin were determined from human cerebrospinal fluid and found 8.13-16.118 μmol L-1 and 3.92-7.44 nmol L-1 with RSD 1.6-3.3 and 1.4-3.6 %.
以2-羟基
萘醛为试剂,通过分光光度法和反相高效
液相色谱法分离和测定了甘
氨酸、赖
氨酸、
章鱼胺、
血清素和
酪胺。在
水-
甲醇溶液中考察了衍
生物的pH值、衍生试剂浓度和加热时间对光谱的影响。衍
生物的摩尔吸光系数为2.8×10³至7.7×10³L mol⁻¹ cm⁻¹。在λmax420 nm处观测到的分光光度校准曲线范围为1.0-20.0 μg mL⁻¹。2-羟基
萘醛衍
生物在Kromasil 100 C-18 10 μm(25 cm × 0.46 cm内径)柱上易于洗脱和分离。洗脱使用
甲醇:
水:
乙腈和
醋酸盐缓冲液(0.1 M,pH 6)(47:25:18:10 v/v/v/v),流速为1 mL min⁻¹,紫外检测波长为240 nm。检测了多种
氨基酸和药物添加剂,均未干扰测定。该方法成功应用于从药物制剂中测定赖
氨酸,以及从人体脑脊液中测定
血清素和甘
氨酸。进一步用标准添加法支持分析。从药物制剂中回收赖
氨酸的回收率为97.46%,相对标准偏差(R
SD)为2.8%。从人体脑脊液中测定的甘
氨酸和
血清素浓度分别为8.13-16.118 μmol L⁻¹和3.92-7.44 nmol L⁻¹,R
SD分别为1.6-3.3%和1.4-3.6%。