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硒是人体必需微量元素之一，测定生物样品中硒含量可了解体内硒含量的状况。用催化极谱法在Ｎａ２ＳＯ３－ＫＩＯ４体系中测定人血清及头发中痕量硒，方法的灵敏度高，测定下限为０．００１μｇ／ｍＬ，线性范围宽，测量体系的抗干扰能力强，重现性好，精密度高，准确性好，相对标准偏差２．０％～５．９％，回收率９６％～１０２％，由于硒易挥发，因此处理样品时采用紫外消化器加盖消化，可有效地防止硒的挥发损失。
Selenium is one of the essential trace elements of the human body, determination of selenium content in biological samples can understand the status of selenium content in the body. Determination of trace selenium in human serum and hair by catalytic polarographic method in Na2SO3-KIO4 system has high sensitivity, the lower limit of determination is 0.001μg / mL, the linear range is wide, the anti-interference ability of measurement system is strong, reproducibility Good, high precision, good accuracy, relative standard deviation of 2.0% to 5.9%, the recovery rate of 96% to 102%, due to the volatile selenium, so when dealing with the sample digested with a UV digester can be effective To prevent the loss of selenium volatility.