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利用改良的石墨炉原子吸收分光术(Graphite furnace atomic absorption spectroscopy)的高度灵敏性,可以分析固体物质。作者以不同浓度的水溶或混入凡士林内的重铬酸钾(K_2Cr_2O_7)敷于表皮上进行试验,在5、24及72小时后取正切皮肤活检标本分析其中的铬含量。一般来说,铬的浓度有2个极大含量点,一个是在表皮与真皮交界处,另一个在真皮的中上部份。这3个不同时间测定的结果甚为接近,5小时后铬的渗透即达稳定状态,并持续到72小时。透入正常皮肤的铬含量是0.4～2PPM。混合在凡士林内的K_2Cr_2O_7比溶于水内的渗透量要大。0.5%浓度的铬相对渗透性要比含
Solid materials can be analyzed using the improved sensitivity of Graphite furnace atomic absorption spectroscopy. The authors applied different concentrations of potassium dichromate (K 2 Cr 2 O 7) dissolved in petrolatum to the epidermis and performed the test. Twenty-five and twenty-four hours later, the specimens were taken for analysis of chromium content. In general, the concentration of chromium has two great points, one is in the epidermis and dermis junction, the other in the upper and middle dermis. The results at these three different times were very close, reaching a steady state after 5 hours of chromium penetration, which lasted for 72 hours. Chromium penetration into normal skin is 0.4 ~ 2PPM. K_2Cr_2O_7 mixed in petroleum jelly is more permeable than water. 0.5% concentration of chromium relative permeability than containing