Kahulugan at paggamit
5.1 This test method is suitable for setting specifications for the materials listed in Table 1 and is used as an internal quality control tool for the production of cyclohexane or for manufacturing processes. It can also be used in development or research work involving cyclohexane.

5.2 This test method can be used to determine the purity of cyclohexane in the presence of normal impurities. If there are extremely high boiling points or abnormal impurities in cyclohexane, this test method will not necessarily detect them, and the purity calculation will be wrong.

ASTM D7266-2013 Standard Test Method for Analysis of Cyclohexane by Gas Chromatography (External Standard)

Hakbang 1: Saklaw

1.1 The test method includes determination of the purity of cyclohexane by gas chromatography. The calibration of gas chromatography system is completed by external standard calibration technology.

1.2 The test method has been found to be suitable for the impurities listed in Scale 1, which are impurities that may be found in cyclohexane. Impurities can be analyzed in the range of 3 to 200mg/kg by this method, but can be applied to a wider range.

1.3 The detection limit is 1 mg/kg.

1.4 When using this test method to determine the consistency of test results with applicable specifications, the results shall be rounded in accordance with the rounding method of Rule E29.

ASTM D7266-2013 Standard Test Method for Analysis of Cyclohexane by Gas Chromatography (External Standard)

1.5 Values expressed in SI units shall be treated as standard values. Walang iba pang mga yunit ng pagsukat ang kasama sa pamantayang ito.

1.6 Ang pamantayang ito ay hindi nilayon upang matugunan ang lahat ng mga alalahanin sa kaligtasan (kung meron man) na nauugnay sa paggamit nito. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, mga kasanayan sa kalusugan at kapaligiran at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin. Tingnan sa Bahagi 8 for specific hazard descriptions.

1.7 Ang internasyonal na pamantayang ito ay batay sa mga internasyonal na kinikilalang pamantayan na mga prinsipyo na itinatag sa “Desisyon sa Mga Prinsipyo para sa Pag unlad ng Internasyonal na Pamantayan, Mga Patnubay at Rekomendasyon” inisyu ng Committee on Technical Barriers to Trade (TBT) ng World Trade Organization.