\tab 文本 \tab 文本未对齐

Question

更新

我正在列出一个食谱，并用它\tab来缩进和列出体积，然后\tab再次列出成分。

在体积为两位数的生产线上，第二个\tab被推离了对齐位置。有什么方法可以简单地克服这个问题吗？我正在使用siunitx单位。

\documentclass[a4paper, 12pt, oneside]{report}
\usepackage[utf8]{inputenc}
\usepackage{chemmacros,siunitx}
\usepackage{float}

%units for mg ML-1 etc
\usepackage{siunitx}
    \DeclareSIUnit\Molar{\textsc{m}}
    \DeclareSIUnit\litre{L}
    \DeclareSIUnit\units{U}
    \DeclareSIUnit\Osm{Osm}
\usepackage{microtype} %stops siunitx units running into margin
\newcommand\tab[1][1cm]{\hspace*{#1}}

\begin{document}
\subsubsection{cDNA library generation}
SuperScript\texttrademark\ IV Reverse Transcriptase (Invitrogen\texttrademark , 18090010) was used to synthesise cDNA from \SI{150}{\nano\gram} of purified RNA. Reaction mixes were prepared in advance and added in two steps. Reaction mix one: \\
\tab \SI{11}{\micro\litre}  \tab RNA (\SI{150}{\nano\gram}) in nuclease-free water \\
\tab \SI{1}{\micro\litre}   \tab  dNTPs (N0447S, New England Biolabs) \\
\tab \SI{1}{\micro\litre}   \tab  Random hexamers (N8080127, Invitrogen\texttrademark ) \\
The reaction mix was heated to \SI{65}{\degreeCelsius} for 5 minutes then placed on ice. The following was then added as part of reaction mix two:  \\
\tab \SI{4}{\micro\litre}   \tab SuperScript\texttrademark\ IV buffer \\
\tab \SI{1}{\micro\litre}   \tab SuperScript\texttrademark\ IV reverse transcriptase \\
\tab \SI{1}{\micro\litre}   \tab DTT \\
\tab \SI{1}{\micro\litre}   \tab RNaseOUT\texttrademark\ (10777019, Invitrogen\texttrademark ) \\
The samples were then heated to \SI{23}{\degreeCelsius}, \SI{55}{\degreeCelsius}, and \SI{80}{\degreeCelsius} for 10 minutes each. The synthesised cDNA was diluted 1:10 with nuclease-free water and stored at \SI{-80}{\degreeCelsius}.
\end{document}

非常感谢