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PerkinElmer

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Whether you're performing analytical or biological analyses, we provide the highest quality standards to help with your testing needs.

Radioisotopic Standards

We provide 3H and 14C standard sets for testing scintillation counter performance, as well as internal standard capsules for your own standard preparation. Each standard is prepared gravimetrically from NIS traceable solutions and QC-tested using our calibrated counting systems.

Analytical Standards

We offer a portfolio of the highest quality inorganic standards and organic standards to enhance your instruments' analytical performance, all certified and tested to provide you the quality and reliability you expect for all your application needs. We also offer a wide selection of GC and GC/MS organic standards, each supplied with a comprehensive Certificate of Analysis that documenting quality and assurance to the highest level obtainable by a calibration standard.

產品與服務 (731)
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1-12 的 731 產品與服務

  • H3 Standard

    Unquenched liquid scintillation counting (LSC) standard, used to optimize liquid scintillation counter settings and to check long term stability of the instrument. 3H Pico standard (7 mL vial) ~ 2.5 x 105 DPM.
  • I125 Pico Calibrator

    I125 Pico-Calibrator

    Pico-Calibrators are matched sets of radionuclide (gamma) point sources that are sealed with epoxy in 12 x 75 mm polypropylene tubes.
  • Tritiated Water

    Internal liquid scintillation counting (LSC) standard. 3H Water, ~2.5 x 106 DPM/g, 10 mL.
  • Quenched Standards

    Ultima Gold Qnch Stds C14-20mL

    Ultima Gold quenched 14C standards for accurate correction of variable quench when using liquid scintillation cocktails from the Ultima Gold family. This set of ten contains ~1 x 105 DPM/vial, in a 20 mL vial size.
  • Iodine-129 Calibration Source

    Iodine-129 Calibration Source

    Calibration sources - 12 x 75 mm for linked belt or cassette sample changers.
  • Combined Quenched Standards

    Quenched liquid scintillation counting (LSC) standards, used to establish efficiency correlation curves applicable to a wide variety of scintillation cocktails and quenching agents. This set contains both 3H and 14C standards, in 20 mL vials.
  • Quenched Standards

    H3 & C14 Small Vial Extended Range Quench Standards

    These standards are recommended to establish quench correlation curves for more heavily quenched samples. The improved efficiency correlation contributes to higher accuracy in the measurements of samples which may be difficult to count correctly. This series only differs in composition from the standards above by the concentration of the quenching agent used.
  • C-14 Internal Standard

    Internal liquid scintillation counting (LSC) standard. 14C Toluene, ~5 x 105 DPM/g, 10 mL.
  • Combined Quenched Standards

    Quenched liquid scintillation counting standard used to establish efficiency correlation curves applicable to a wide variety of scintillation cocktails and quencing agent. This combined set of 3H and 14C standards comes in 7 mL vials.
  • PerkinElmer

    C14 Small Vial Extended Range Quench Standards, 7mL

    These standards are recommended to establish quench correlation curves for more heavily quenched samples. The improved efficiency correlation contributes to higher accuracy in the measurements of samples which may be difficult to count correctly. This series only differs in composition from the standards above by the concentration of the quenching agent used.
  • PerkinElmer

    Background Standard

    Unquenched liquid scintillation counting (LSC) standard, used to optimize liquid scintillation counter settings and to check long term stability of the instrument. This background standard is provided in a 20 mL vial.
  • Unquenched Standard

    Unquenched Standard (Background) Ll, Background standard for low level counting, 20mL

    Unquenched background standard for low level counting, 20 mL vial
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1-2 的 2 Business Insights

  • 應用文獻

    Fast Digestion Analysis of Lead and Cadmium in Rice Using GFAAS with Deuterium Background Correction

    Toxic elements, such as lead (Pb) and cadmium (Cd), are entering the food chain through environmental contamination. Rice, as the most widely consumed cereal grain in Asia, can quickly pick up Pb and Cd from soil, thereby seriously endangering human health through diet. These toxic element levels need to be carefully monitored. Maximum levels of Pb and Cd are strictly regulated in Asian countries, especially in China; therefore, it is extremely important to develop a simple, reliable method for trace levels of Pb and Cd in rice. The allowable maximum levels of Pb and Cd in grains in EU and China are required to be below 0.2 mg/kg (Commission Regulation EC 1881/2006 and Chinese GB 2715-2016 Hygienic Standard). Graphite furnace atomic absorption spectroscopy (GFAAS) is the officially recommended technique for detection of trace elements in various food stuffs (GB/T 5009.15-2017, GB/T 5009. 12-2017 and EN 14083:2003). Food samples are usually pretreated before GFAAS analysis using various methods: microwave digestion, hot block digestion, dry ashing, and hot plate digestion. These conventional digestion procedures are usually complicated and time-consuming (2-4 hours or longer). Plus, they require large quantities of corrosive and oxidizing reagents, increasing the chance for contamination which could lead to inaccurate results. However, fast digestion can effectively speed up the sample preparation procedure while reducing the use of corrosive reagents and the chance for contamination.

  • 應用文獻

    Fast Digestion Analysis of Lead and Cadmium in Rice Using Graphite Furnace Atomic Absorption

    Lead (Pb) and cadmium (Cd) are common pollutants in grains and are extremely toxic. Pb is harmful to human organs even at trace levels, and once it accumulates in the body, it causes inhibition of hemoglobin formation and neurological disorders. Cd is even classified as human carcinogen [Group 1 - according to International Agency for Research on Cancer]. It is reported that Cd leads to severe kidney problems which can be fatal and is also associated with brittle bones and liver problems. Rice, as the most widely consumed cereal grain in Asia/China, can quickly pick up Pb and Cd from toxins, pesticides and fertilizers in the soil, thereby endangering the health of millions of people through their diet. Therefore, it is extremely important to develop a simple, reliable method to monitor the levels of Pb and Cd in rice. According to Chinese national standard GB 2715-2016 Hygienic Standard for Grain, the maximum concentrations of Pb or Cd in grains must be below 0.2 mg/kg; the allowable level in the European Union is the same [EC 1881/2006]. The official technique for the determination of heavy metals in both cases is graphite furnace atomic absorption spectroscopy (GFAAS, GB/T 5009. 12-2017, GB/T 5009-2017. 15 and EN 14083:2003). Samples can be pretreated using various methods, including microwave digestion, hot block digestion, dry ashing, and hot plate digestion. It is found that these conventional digestion procedures are always complicated and time-consuming (two-four hours or even longer). Plus, conventional sample preparation techniques require large quantities of corrosive and oxidizing reagents, increasing the chance for contamination which could lead to inaccurate results. Special PTFE vessels are needed for microwave digestion; however, reusable utensils might also cause cross contamination.

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