カ ド ミウム(Cd)作 業者 のCd曝 露 指 標 として,血 液 お よび 尿 中Cdの 測 定 が有 効 であ り1),こ れ ら生体 試 料 中 のCd測 定方 法 と しては黒 鉛 炉原 子 吸 光法2~6)が 広 く 用 い られ て い る.こ の方 法 に よるCd定 量 では, Cdお よび そ の化合 物 の融点 が低 いた め,原 子 化 段階 以 前 での 揮 散 が問 題 で あ り,対 策 と して適 当な 干渉 抑制 剤 を添 加 す る ことに よ り,揮 散 を 抑制 す る方 法 が と られ て い る. Cd定 量 に 対 して は, HNO32-4), NH4H2PO43,4), NH4NO33-5), NH4F4,6)お よびPd(NO3)25)な どが 干渉 抑制 剤 と して提 唱 され て い る.血 中Cd(Cd-B)の 定量 に従...

We describe a convenient, sensitive, accurate, precise and direct method for lead analysis in blood by use of the graphite-tube furnace with an atomic absorption spectrophotometer. Advantages of this proposed method are the ultramicro sample size and the minimal sample preparation required. Interferences by the major cations and anions in blood were studied and minimized. Anticoagulants examine...

Now that the level of concern for a toxic blood lead concentration is 0.482 mumol/L (10 micrograms/dL), laboratories must meet new requirements to shorten analysis times and increase accuracy and precision of blood lead determinations. We used a matrix-matching method to estimate the lead concentration in blood by graphite furnace atomic absorption spectroscopy (GFAAS). For CDC proficiency samp...

We describe a technique for determining nickel in serum by flameless atomic absorption, with use of dimethylglyoxime. The procedure permits a greater number of analyses per technician at a relatively low cost, yet provides acceptable accuracy and reliability. After the sample is evaporated and dry ashed in a muffle furnace at 560 degrees C for 5 h, the residual salts are dissolved in hydrochl...

A direct method is presented for the determination of manganese in whole blood or serum by atomic absorption spectroscopy, using a graphite furnace with a temperature ramp controller. Blood or serum is diluted with an equal volume of a five percent solution of Triton-X100 containing heparin. This prevents the blood from coagulating and produces a solution with a viscosity suitable for injection...

A method of fluorination assisted electrothermal vaporization inductively coupled plasma mass spectrometry (FETV-ICP-MS) was developed to directly determine the trace impurities in niobium pentaoxide solid powder in which a poly(tetrafluoroethylene) (PTFE) emulsion was used as fluorinating modifier to promote the vaporization of refractory elements from a graphite furnace and to avoid the forma...

Few published studies have investigated the presence of lead in the e-liquid of electronic nicotine delivery systems (ENDS). Lead inhalation is associated with increased risk of stroke, heart disease, and other diseases. This study used a novel application of graphite furnace technology to compare the concentration of lead between e-liquids of different packaging and product designs using e-liq...

Liquid chromatographs, coupled with graphite furnace atomic absorption spectrometers, have been widely used for the identification and quantification of trace element compounds. The quantification of the discontinuous signals from the spectrometer defining a chromatographic band is very much a matter of judgement and therefore prone to error. This paper describes a system which links a high-per...

We developed a precise and accurate graphite furnace atomic absorption spectrometric method for the direct determination of zinc in serum. Serum samples are analyzed after 20-fold dilution with water of ultrapure analytical grade. No other reagent is used, from the moment of sampling until measurement. During atomization, the argon flow is kept at 150 mL/min instead of gas stop, to decrease the...